If the government are strict about taxes, P2P won't enough to solve the problem because you still receive the money through banks. Exchange to cash is risky though, criminals can threaten by pointing their gun on our head.
We have F2F kind of P2P trade which I consider the worst as the risk attached to it is more dangerous than the government coming for you just like you have mentioned at gunpoint. If someone can get a good vendor from one of the P2P platforms that don’t deal with KYC, that will be the best, but to trade a large sum will be a great challenge unless you have to be selling bit by bit. Once the government wants to come after holders, trading it anonymously becomes a big challenge; either you stress yourself to make it happen or you give in and remit their blood-sucking tax to them.