Is there a such thing as counterfeit crypto?

would it be possible for me to be buying counterfeit crypto on bisq, or is that virtually impossible. I’m still trying to wrap my head around how a DAO can reliably ensure that there are no scammers.

Bisq uses Bitcoin (BTC) as the trade pair for all trades.

Bisq is software. One of the things it does is to verify the transactions that occur.

When you buy BTC from someone on Bisq the software make sure the transaction has occurred on the blockchain (confirmation) before letting you know you can send payment.

Therefore, you cannot buy counterfeit Bitcoin on Bisq.