What crypto? Cryptocurrency or cryptography? This first one is optional to be used with the protocol. The second not (see NIP-01 https://nips.nostr.com/1).
What a question. Obviously I'm all for it to use cryptography in their communications, and It's ridiculous that I have to spell out that I object to the cryptocurrency bros peddling their ecoins all across the board. People there are so desperate to convert electricity into millions of USD.
