So you're trying to evade taxes
in Belgium. Exchanging crypto for crypto without KYC is (still) quite easy, but if you want euros, you only have 2 options: trade in person (which is risky), or using your bank account. And if you're already concerned about your bank's response when you receive euros registered KYC exchange, you can expect a lot more questions if you receive large amounts of money from P2P-transactions. Did you know it's not possible to receive money by bank without the other party knowing your bank account number
and name?
The excuse is always that governments have to prevent money laundering
It sounds like you're trying to do the opposite: turn legal money into untaxed "illegal" money. That's a risky business!