It will not be advisable to make transactions in bitcoin within a country where cryptocurrency transactions are illegal by the law. But Imagine this scenario that someone has been using their bitcoins for transaction secretly successfully, and then one day decides to use the bitcoin that they have to make payment for something like a property to the owner of the property, If there is this kind of problem for instance where the owner of the property decides to claim that they did not receive any money in bitcoin, and the case is taken to a law court, what do you think the outcome of the case will be?
If proofs of payment are provided but in cryptocurrency, do you think the court will consider it even though transactions are tagged illegal with it? or will the case be thrown out and the owner of the property with the false claim of not receiving the money be allowed to go freely?

It will not be advisable to make transactions in bitcoin within a country where cryptocurrency transactions are illegal by the law. But Imagine this scenario that someone has been using their bitcoins for transaction secretly successfully, and then one day decides to use the bitcoin that they have to make payment for something like a property to the owner of the property, If there is this kind of problem for instance where the owner of the property decides to claim that they did not receive any money in bitcoin, and the case is taken to a law court, what do you think the outcome of the case will be?
If proofs of payment are provided but in cryptocurrency, do you think the court will consider it even though transactions are tagged illegal with it? or will the case be thrown out and the owner of the property with the false claim of not receiving the money be allowed to go freely?

It will not be advisable to make transactions in bitcoin within a country where cryptocurrency transactions are illegal by the law. But Imagine this scenario that someone has been using their bitcoins for transaction secretly successfully, and then one day decides to use the bitcoin that they have to make payment for something like a property to the owner of the property, If there is this kind of problem for instance where the owner of the property decides to claim that they did not receive any money in bitcoin, and the case is taken to a law court, what do you think the outcome of the case will be?
If proofs of payment are provided but in cryptocurrency, do you think the court will consider it even though transactions are tagged illegal with it? or will the case be thrown out and the owner of the property with the false claim of not receiving the money be allowed to go freely?

If you are going to use bitcoin in a country which considers it to be illegal then I think a VPN would be recommended, but when it comes to transactions which involve big sums like buying assets such as a house then documents will be needed, if you can afford a lawyer to facilitate the transaction then do so to protect your transaction just to make sure you have this recorded somewhere!!

Never go the crypto way to buy assets without witnesses because the seller can easily say they dont remember receiving these funds or this didn't happen and you can be at a great loss.

You will not benefit from taking legal advice from the internet, not to mention that this advice is for a scenario that is unlikely to happen.

Do not take legal advice from the internet, including the advice above.

The difference in interpretation of such a case will be in the real estate law, if it allows payment in any currency, then the sales contract is valid, but since you owned the house with illegal money, the house may be confiscated and you may be imprisoned, so the contract is valid, but you will cause yourself legal problems.