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 enforcing the deal, you would likely expect a significant extra markup above "normal price" to sell the house this way. Furthermore, if this is criminalized, then even offering or requesting this as an option carries some risk.

Also, I'm not informed of Indian law, but in most western countries this "donation of house" would definitely incur a significant tax and possibly trigger a tax audit/money laundering investigation. Combined with the risk markup, that would meant that laundering cryptocurrencies would be somewhat expensive. Not impossible, of course, money gets laundered - but it would mean that you would actually have to follow all the inconveniences, risks and costs of a money laundering process if you'd want to handle cryptocurrency, and that would discourage many people from doing so.