You will definitely will get back some of them or all 6 BTCs also. But the catch is after getting back, I believe you will not stop gambling and you go for another cycle of winning->loosing->recovering. This is the common scenario of many gambler's life cycle.
Are you really sure after loosing people again they will win in gambling? and is this cycle is true winning->loosing->recovering?
I don''t think is there any rule in gambling after loosing one must win again. Most gambles are thinking this kind of cycle will be there and they will get a chance to recover their loses but many gambles never get this chance so they lose everything at the end.
It is just another form of gambler's fallency. Just like how some gamblers believe that after getting a lot of "highs" in dice there should be more "lows" than "highs" in the coming bets, some believe after getting some "bad luck" they should be having "good luck" afterwards.