Do I understand correctly that I can trade every cryptocurrency with each other? Or do you just like the other exchanges offer trading pairs against BTC, ETH, LTC, ....?
I think it should typically work like the norm, there is always a base currency in every trade or pair just as the case of the USD being a base currency for the USDCAD pair, it should be the same for the 3 currencies you also mentioned, they are the base upon which all other currency are paired
While your right theirs an infinite number of possibl base pairs he’ll even for stablecoin bases usdt usdc tusd and god knows how many else those are just the usd ones theirs EUR as well as many other stable coins