Hello! To be honest, I'm so tired of waiting for transactions. I use changelly and I have to wait for my transaction for 5-30 minutes and that's exhausting. Do you know exchanges with faster transactions?
The transaction in cryptocurrency are fast especially if it is on ERC20, NEP5 EOS or waves and others.
Only BTC will take a bit time, but about the speed rate, it is also dpends on the efficientcy of the exchange you are dealing with.
They need time to verify the transaction and send it.