I searched some p2p markets and found
https://bisq.network/,
https://hodlhodl.com and
https://robosats.com, but all of them are bitcoin centric, in the sense it is possible exchange a set of coins to bitcoins or the oposite, bitcoin to some altcoin or fiat.
I totally agree bitcoin deserve its top position, but is there some p2p market not centered around bitcoin? I'd like to exchange eth for fiat (directly), for instance.
Centralized exchanges mostly allow crypto-to-fiat P2P transactions. Crypto-to-crypto transactions aren't necessary in there because there is already lots of altcoin pairs with one another and stablecoins. So it doesn't need to crypto-to-crypto P2P trade. I am not sure if there is any service like that but i have seen some crypto project that allow token conversion between bitcoin and some major altcoin like ETH, matic, SOL, XRP etc. Not sure how safe they are to use but this type of service exists.