Islam does not allow gambling. But what is bitcoin as gambling? Gambling it's diffrent with Trading.
Gambling is an activity of drawing fate! For example grab a dice, select a number and then hope the number will appear, throw the chest ... the decision-making process is complete when the dice is thrown, the end we never know and can not control it.
Then what about trading? Trading is a decision making activity involving many aspects ranging from market research and analysis, financial management and risk management to psychology management to recognizing market psychology as well as the ability to control oneself.
But what distinguishes a trader from a gambler is a trader has the ability to read things and then change them for example by counter-trading, running a backup strategy when realizing the predefined calculation and analysis is wrong. A trader has the ability to turn an unfortunate circumstance into a favorable state for himself.
"Allah will not change the fate of a people except the people themselves who change what is in themselves" QS. Ar-Ra'd (13): 11.
I'm muslim too.