Now my main aim of creating this thread is that a friend asked me to send my BTC wallet address so that he can send me Bitcoin for me to sell it and send him fiat, but I am curious because of my safety since I don't know the source of his BTC if he got it by scamming someone. A thought cam to me that this might be a risky transaction and I don't want to send him my exchange wallet address.
If you have reservations and you are not 100% confident then just don't do it. If something goes wrong, your friendship might get ruined. Better to just tell him that you are not comfortable in exchanging fiat for him.
My question now is that to be on a safer side which wallet is best needed for me to send him for transaction that can not be traced even though I am not sure if it's from a scam wallet or not.
If you still really want to go through this then just make sure to not use exchanges with KYC because if the bitcoin is indeed from scams, you might be investigated by the authorities and you will get in deep trouble.