Bithead

Someone who is only interested in Cryptocurrency. Often has tendencies to egocentrism and in extreme cases can sound like some cultist

A & B: Hey! What have you been up to lately? We haven't heard of you for ages!
C: Have you heard about Bitcoin? You must've it's all over the news. Since I started using it I exchanged all my Fiat to Crypto and I feel so much better now without those banks.
B: OK... Sounds... nice...
C: Also I set up my own mining farm, which is using heavy oil I found in an abandoned ship. But don't worry it's 100% green, I bought certificates. And it also only needs 90% of the energy those banks use. But it's still open for beginners because only 1% of humanity is using it right now. But I tell you it's gonna be big!
A & B: Yeah... we must go now...

A: C totally became a Bithead!
B: Yes, we should stay away from him.