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Your story sounds invented to me to be honest, since you don't mention how the transaction was legally recorded. And the fact that it is in a place where Bitcoin is illegal makes it even stranger.
If I buy a house or land, I have to go to the notary and the property registry where it is documented that I acquired such property, for X money and that the form of payment is such.
Lately I have seen several stories of this style that talk about using Bitcoin as a means of payment and it gives me that at least some of them have more to do with trying to get merit than with a description of reality.
I couldn't have agreed with you more. If anyone has to tell us how they have been promoting Bitcoin in one transaction or the other< i believe some sort of proof should have been provided even if some sensitive info has to be redacted in such info. Also, despite both of them, "Seller and Buyer" have been into Cryptocurrency, yet, the OP has to advise the seller to convert his BTC to a stable coin to avoid price fluctuation
This didn't happen by chance because I know that the landowner is one of those people who are also bitcoin users.
This is a real event, I told the seller that he has to convert his bitcoin directly to stablecoin if he doesn't want the money I paid in bitcoins for his land payments to fluctuate.