I don't think you understand how this works. He has not lost 137BTC, or deposited that much; that just means that he has wagered that amount. Even if you start with 1BTC, you could easily end up wagering multiple amounts of BTC with that single deposit. Does that make sense? You use the same btc you started with, but every time you bet, win or lose, gets added to the amount wagered.

Whoops, sorry, I thought he had wagered that amount; I should have paid attention to the details before replying lol. You would be correct, that he has lost 137BTC (now it's over 138BTC), but that was from the total amount that he has bet. It's not that he lost 137BTC from his wallet, but from even the accumulated winnings that he has had. Does that make sense? It's the same principle as I detailed above, but for your overall loss, instead of the amount wagered.

EDITED because of my lack of ability to pay attention to details.