In Shariah, there is no valid reason to accept Bitcoin or other Cryptocurrencies as a currency. It is just an imaginary number, which is generated through a complex mathematical process. It is purchased for Gambling or Speculations, and used in illegal or unlawful transactions”.
You should have posted the source for this.
I'll be doing this for you:
https://aims.education/is-bitcoin-halal-or-bitcoin-haram/It's an older news, and back then more were telling that Bitcoin is haram.
But their logic is flawed, they clearly don't understand Bitcoin and were misled by how media was presenting Bitcoin, hence I expect that this view is bound to change over time.
As in quite a number of dilemmas related to religion, this too depends a lot by
who are you asking (and it doesn't matter how big authority he is) and
when (people's understanding usually evolves in time).