What is Bitcoin in France? Bitcoin is money, is it a commodity or property?
If an apartment is bought for apples, then this is not a purchase of an apartment, but an exchange agreement
I understand that it is possible to agree on the amount of bitcoins, but I do not understand what additional documents need to be signed so that the parties cannot make claims to each other after the transaction if the price of bitcoin changes.
In any case, it's not a currency in France (https://www.economie.gouv.fr/particuliers/cryptomonnaies-cryptoactifs). The notary will take care of the sales contract. Just like an employment contract, a marriage contract or any other contract.