https://cointelegraph.com/news/is-bitcoin-halal-how-cryptocurrency-conforms-with-islam-and-sharia
“As a payment network, Bitcoin is halal. In fact, Bitcoin goes beyond what more conventional closed banking networks offer. Unlike conventional bank networks which use private ledgers where there's no guarantee that the originator actually owns the underlying assets, Bitcoin guarantees with mathematical certainty that the originator of the transfer owns the underlying assets. Conventional banks operate using the principle of fractional reserve, which is prohibited in Islam.”
its actually more Acceptable within Islam than Modern Banks (unless you use a Sharia Account)
Hopefully that article might shed some light for anyone wishing to find out more about it (was news to me only looked it up just now out of curiosity)