It’s a perfect use case for Patreon, PayPal, and similar services that are easier to set up than any of the things you mentioned. And the stability of fiat currency is a benefit when we’re looking at covering operating costs.
Crypto is fine as an option, but it doesn’t seem like a great fit for the primary.
Especially true when the name of the instance in question is exactly what people are going to be punching into a search. They got in on the ground floor, they’ll be just fine.