If I purchase bitcoins via p2p, can I get some problems if the bitcoins I get were involved in some criminal activity ? If yes then how do I avoid such situation ?
Since you are buying on P2P, let's say the seller is getting Bitcoin from a criminal act.
First, you are just a buyer with the reason you do not know the history of the seller at all.
Second, pay attention to before/after transactions:
for example, if you know that Bitcoin sellers in P2P are criminals but you keep buying then you are considered involved. However, if the other way around, if you find out that the seller is a criminal
after you buy, then I think you have the power of proof where you are just a buyer just making a transaction.
Is that as easy to confirm? that is knowing if the person you are transacting with on P2P is a criminal? Till now I never really thought about OP's concern which is really valid and since most of us have these p2p transactions how do I really know which of the "Satoshi" was criminally obtained since I was buying them in bits on different transactions?