What is the best and cheapest way to Exchange cryptocurency?
Without all most 0 fees!!
It will not be possible from any crypto exchanges such as dex or cex whatever its because all of the crypto exchanges asking minimum fees will require to exchange with your assets. Peer to Peer transaction is the best way to exchange without no fees but you can do it with only your close people likes friends and neighbours or something like that otherwise you will most possibility to get scam with unknown people. Another the best option is escrow personally i think.