I had been in your place before and had ups and downs in magnitude of a few btc every day. But then I realized it was not a good idea and I only make small casual bets for fun now. I would also suggest you to think whether you are gambling too much now.
He already used to betting big. So it is very hard for him to adjust to bet like 1mbtc or even 0.01mbtc. All we can do is just hope he would be mable to make a bit more profit and hope he quit for good.
And that must not happen because you also know that the value is going to be higher slowly and if you are gambling it will be always a risky thing.