Scott Blumstein of the U.S. competes during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/Steve Marcus 

Scott Blumstein of the U.S. competes during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Benjamin Pollak (L) of France and Dan Ott of the U.S. compete during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/Steve Marcus 

Benjamin Pollak of France competes during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Scott Blumstein of the U.S. smiles during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Benjamin Pollak of France competes during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Benjamin Pollak of France competes during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Benjamin Pollak of France competes during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Scott Blumstein (L) of the U.S., Benjamin Pollak (C) of France and Dan Ott of the U.S. compete during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Scott Blumstein (L) of the U.S. contemplates his move after Benjamin Pollak (R) of France goes all-in during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Benjamin Pollak of France waits by friends and supporters during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Benjamin Pollak of France competes during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Scott Blumstein (L) of the U.S., Benjamin Pollak (C) of France and Dan Ott of the U.S. compete during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Scott Blumstein (L) of the U.S. contemplates his move after Benjamin Pollak (R) of France goes all-in during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Benjamin Pollak of France waits by friends and supporters during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Dan Ott of the U.S. competes during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Dan Ott of the U.S. competes during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Scott Blumstein of the U.S. competes during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Benjamin Pollak of France competes during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Dan Ott of the U.S. competes during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Scott Blumstein of the U.S. smiles during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Benjamin Pollak of France competes during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Benjamin Pollak of France competes during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/STEVE MARCUS 

Scott Blumstein (L) of the U.S., Benjamin Pollak (C) of France and Dan Ott of the U.S. compete during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/Steve Marcus 

Scott Blumstein (L) of the U.S., Benjamin Pollak (C) of France and Dan Ott of the U.S. compete during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/Steve Marcus 

A championship bracelet is displayed on stacks on $100 bills during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/Steve Marcus 

Scott Blumstein (L) of the U.S. and Benjamin Pollak of France compete during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/Steve Marcus 

Benjamin Pollak (L) of France, Scott Blumstein (C) of the U.S., and Dan Ott of the U.S. compete during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/Steve Marcus 

Scott Blumstein of the U.S. competes during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/Steve Marcus 

Benjamin Pollak (L) of France and Dan Ott of the U.S. compete during the World Series of Poker Main Event final table in Las Vegas, Nevada, U.S., July 22, 2017. REUTERS/Steve Marcus 

Elderly people play poker at an adult daycare centre named "Day Service Las Vegas" in Tokyo, Japan, February 16, 2017. REUTERS/Toru Hanai 

Yusai Urazumi (R), 92, plays poker at an adult daycare centre named "Day Service Las Vegas" in Tokyo, Japan, February 16, 2017. REUTERS/Toru Hanai 

Elderly people play poker at an adult daycare centre named "Day Service Las Vegas" in Tokyo, Japan, February 16, 2017. REUTERS/Toru Hanai 

Elderly people stretch before playing poker and mahjong at an adult daycare centre named "Day Service Las Vegas" in Tokyo, Japan, February 16, 2017. REUTERS/Toru Hanai 

Elderly people play mahjong and poker at an adult daycare centre named "Day Service Las Vegas" in Tokyo, Japan, February 16, 2017. REUTERS/Toru Hanai 

Yusai Urazumi, 92, receives a health check-up at a poker desk before playing poker at an adult daycare centre named "Day Service Las Vegas" in Tokyo, Japan, February 16, 2017. REUTERS/Toru Hanai 

Elderly people play poker at an adult daycare centre named "Day Service Las Vegas" in Tokyo, Japan, February 16, 2017. REUTERS/Toru Hanai 

Elderly people play poker at an adult daycare centre named "Day Service Las Vegas" in Tokyo, Japan, February 16, 2017. REUTERS/Toru Hanai 

U.S. soldiers from the 2nd Brigade, 82nd Airborne Division play poker at a military base north of Mosul, Iraq, February 14, 2017. Picture taken February 14, 2017. REUTERS/Khalid al Mousily 

U.S. soldiers from the 2nd Brigade, 82nd Airborne Division play poker at a military base north of Mosul, Iraq, February 14, 2017. Picture taken February 14, 2017. REUTERS/Khalid al Mousily 

A British retiree living in Spain holds poker cards while playing bingo with other compatriots after winning a cookies package as they gather for a coffee morning organised by a charity at a bar in Fuengirola, near Malaga, southern Spain, November 17, 2016. Picture taken November 17, 2016. To match Insight BRITAIN-EU/SPAIN REUTERS/Jon Nazca 

Ground staff of German airline Lufthansa protest against the ongoing stikes of Lufthansa pilots at Frankfurt airport, Germany, November 30, 2016. Placards read "No power poker on ground staff" and "End strike - mediation now". REUTERS/Kai Pfaffenbach

Ground staff of German airline Lufthansa protest against the ongoing stikes of Lufthansa pilots at Frankfurt airport, Germany, November 30, 2016. Placards read "No power poker on ground staff" and "End strike - mediation now". REUTERS/Kai Pfaffenbach

Ground staff of German airline Lufthansa protest against the ongoing stikes of Lufthansa pilots at Frankfurt airport, Germany, November 30, 2016. Placard reads "No power poker on ground staff" REUTERS/Kai Pfaffenbach

Retired steel worker, Jim McAndrew plays poker with friends at a union hall in Bethlehem, Pennsylvania, U.S., November 9, 2016. McAndrew, a life-long Democrat, did not cast a ballot in this year's race, the first time he has not voted for his party's presidential candidate. REUTERS/Peter Eisler 

Retired steel workers Mike Pron (L to R) Jim McAndrew, Charlie Kelly, Joe Gonda and Ken Rayden play poker in a union hall in Bethlehem Pennsylvania, U.S., November 9, 2016. Among the five retirees, all life-long Democrats, only three cast ballots for Clinton in a county which voted Democratic in the past two election cycles but backed Republican Donald Trump in this year's presidential race. REUTERS/Peter Eisler 

The 2016 championship bracelet is displayed on stacks of cash after Qui Nguyen, of Las Vegas, won the World Series of Poker Main Event in Las Vegas, Nevada, U.S. November 2, 2016. REUTERS/Las Vegas Sun/Steve Marcus 

Qui Nguyen's cards are displayed on stacks of cash after Nguyen, of Las Vegas, won the World Series of Poker Main Event in Las Vegas, Nevada, U.S. November 2, 2016. REUTERS/Las Vegas Sun/Steve Marcus 

Qui Nguyen of Las Vegas holds up bundles of cash after defeating Gordon Vayo of San Francisco to win the World Series of Poker Main Event in Las Vegas, Nevada, U.S. November 2, 2016. REUTERS/Las Vegas Sun/Steve Marcus 

Gordon Vayo of San Francisco gets a hug from his fiancee Kate Dessa after finishing in second place in the World Series of Poker Main Event in Las Vegas, Nevada, U.S. November 2, 2016. REUTERS/Las Vegas Sun/Steve Marcus 

Qui Nguyen of Las Vegas holds up his championship bracelet after defeating Gordon Vayo of San Francisco to win the World Series of Poker Main Event in Las Vegas, Nevada, U.S. November 2, 2016. REUTERS/Las Vegas Sun/Steve Marcus 

Qui Nguyen (C) of Las Vegas poses with family and friends after defeating Gordon Vayo of San Francisco to win the World Series of Poker Main Event in Las Vegas, Nevada, U.S. November 2, 2016. REUTERS/Las Vegas Sun/Steve Marcus 

Qui Nguyen of Las Vegas poses with family and friends after defeating Gordon Vayo of San Francisco to win the World Series of Poker Main Event in Las Vegas, Nevada, U.S. November 2, 2016. REUTERS/Las Vegas Sun/Steve Marcus 

Qui Nguyen of Las Vegas poses with his championship bracelet after defeating Gordon Vayo of San Francisco in the World Series of Poker Main Event in Las Vegas, Nevada, U.S. November 2, 2016. REUTERS/Las Vegas Sun/Steve Marcus TPX IMAGES OF THE DAY

Qui Nguyen of Las Vegas holds up bundles of cash after defeating Gordon Vayo of San Francisco to win the World Series of Poker Main Event in Las Vegas, Nevada, U.S. November 2, 2016. REUTERS/Las Vegas Sun/Steve Marcus 

Qui Nguyen (L) of Las Vegas competes against Gordon Vayo of San Francisco during the World Series of Poker Main Event in Las Vegas, Nevada, U.S. on November 1, 2016. REUTERS/Las Vegas Sun/Steve Marcus TPX IMAGES OF THE DAY

Gordon Vayo (R) of San Francisco considers his move after Qui Nguyen (L) of Las Vegas goes all-in during the World Series of Poker Main Event in Las Vegas, Nevada, U.S. on November 1, 2016. REUTERS/Las Vegas Sun/Steve Marcus 

Supporters of Qui Nguyen celebrate as Nguyen wins a hand during the World Series of Poker Main Event in Las Vegas, Nevada, U.S. on November 1, 2016. REUTERS/Las Vegas Sun/Steve Marcus 

Gordon Vayo of San Francisco cracks a smile after folding a hand to Qui Nguyen of Las Vegas during the World Series of Poker Main Event in Las Vegas, Nevada, U.S. on November 1, 2016. REUTERS/Las Vegas Sun/Steve Marcus 

Gordon Vayo (R) of San Francisco considers his move after Qui Nguyen of Las Vegas goes all-in during the World Series of Poker Main Event in Las Vegas, Nevada, U.S. on November 1, 2016. REUTERS/Las Vegas Sun/Steve Marcus