I don't think it is worth the risk of losing such amount of money. I mean, he could take $10k and bet on x2 trying to win that amount without putting 1.4M on the game. In the end, this was one of those non-cheap lessons and we should learn something about it.
That's really unlucky but what strikes me is that he was willing to bet so much money to get such a small profit, like people who martingale having a huge bankroll but betting with pennies so that they can be ready for 20 consecutive losses. In the end after a lot of games and enormous risk they come out with $50 in profit or something like that, but in the meantime they had to put 50k at risk every round... This just doesn't make sense!
If he desperately needed 10k there were so many things he could've done to get it.
10k is just 1% of a million and almost anything you can think of can give you 1% profit. Renting out an apartment gives at least 5% a year, US bonds pay 3%, savings accounts usually 2-5%, not to mention bitcoin that produced 10% profit compared to December.