We can see it when Bitcoin will be legal because in some countries Bitcoin is banned so you can not pay players with it and then they loose it.
But I don't think that it will happen even when it will be legal because its value is so volatile.
First of all, for the volatility of the bitcoin value I think if the both sides : sender and receiver are agree to be dealing with bitcoin.
Second, the legality of the bitcoin is only a matter of time, sooner or later Bitcoin would be legal and the transactions would increase. Which will engender an explosion of value too. Finally, I want to remind you that with bitcoin everything is possible !
the legality of bitcoin still debatable currently but still possible to bitcoin being legal for major countries but in my view volatility still being the main problem to transfer players use bitcoin and as far as i know there is no steady price for bitcoin so this is might be slightly hard