Gambler is only a gambler which mean they only care about how to used their bitcoin to gamble and i think basically they didn't care about the value of bitcoin in the future whether it will be so high or not because all they know is if have bitcoin then immediatelly to gamble using that coin and in my opinion they have no attention to considers bitcoin as investment asset that's why i am sure the gamblers mostly don't have bitcoin into their wallet because they didn't interested to hold bitcoin for long term purposes and indeed if we look back when bitcoin prices is still cheap it is very easy to spend 0.1 - 0.5 bitcoin everytime to gamble which if we see from the current price and probably didn't used that for gamble i am sure we have already to became an the millionare