OK, so that could be legal, but if you want to be useful, give us the name of a notary who would accept to do it.
What fees do you suggest for finding a notary? I'm no longer useful for free in my old age

But you're used to real estate transactions, so explain what you want to your notaire and he won't really have any reason to refuse.
It's not for me. It's about being useful to the community here.
I would never buy a property with
BTC. That's an incredibly stupid idea. People who promote it have no business experience, or are crooks. Never use
BTC to buy real estate. That's my advice.