Cardano my firend is 12-18 months away from being operational, it's just speculative token that doesnt do anything right now
As for ethereum it's conjested and pressed against the wall. they really need to come up with a solution to adress this issue fast but it seems the solution is 12 months away from being implemented too. also the Parity multisig situation doesnt help at all at there is a risk of forking and splitting the chain again. Waves seems like it has everything in place and figured out in advance.