If fiat currencies are halal, then bitcoin is also halal. Bitcoin is pure technology. Discovered as a result of research and knowledge.
I think bitcoin is lawful. we are investing not playing gambling. we invest hard to make money. so I think bitcoin is lawful because we invest with great effort.
if for me bitcoin does not gamble, so there is no reason for me to say that bitcoin is haram', bitcoin is a crypto currency to use as an investment or trade, so bitcoin in my opinion is legitimate and legitimate, so for example someone says bitcoin is haram ' maybe they don't understand bitcoin.