Thats 20 coin flips, that doesnt include the hands he won with the best hand.
So assuming you need to accumulate 60 mil chips since there were approximatly 6k players in this years WSOP. Your best case scenario is you have to double up 13 times to get all the chips. This would work if you never lost a hand, paid a BB/SB or ante. Not real likely.
The crazy thing about trying to double up 13 times. So say preflop you are looking for the best possible scenario. You get all in with AA vs A8o. You are a just just barely better than 13:1 favorite. So you are still pretty much 50:50 to win all these dominated hands. If you run the same calculation with AA vs KK. You are a 5:1 underdog to win all 13 hands. This is precisely why every WSOP must get lucky, if for no other reason that they get lucky by not getting unlucky.