It's good that you have money to spare, but why not bet at fiat like I and others have mentioned?

Or, spread your bets out. It seems to be the best approach at the moment for your situation, and that way you can bet all 50k.
Spreading your bets out is a bit of a pain, but it is more secure and you can bet bigger that way. Just maybe write things down to keep track of everything.

OP, if you have a lot of money to spare, have you considered investing in a gambling site? You could make a lot of profit. Good luck!