Earlier quoted context omitted.
Just checking possibilities here. Let's say you want to buy my house and I want to sell it to you. We are in India. You transfer crypto to my wallet then I, in return, donate my house to you. Would this donation work on the legal papers today? I suspect that in Brazil, where I live today, it would.
Sure, a black market is possible - I explicitly mentioned legitimate sellers. But why would you want to sell a house this way instead for a permitted means of payment? Even if your scheme is unlikely to be detected, if does add a nontrivial risk of getting detected (or getting intentionally exposed, or blackmailed to get exposed) and get very unpleasant consequences for that, and given the extra difficulties of enfor…
I can think of a few reasons. The buyer offers you a large premium, you know people who can help you offload the currency, you have no interest in keeping your capital in a controlled environment, maybe you're selling your house because you're leaving a country and taking bitcoin or whatever is the easiest way to take your capital with you.