Eth is certainly a project to watch, with the coming upgrades.
Cardano is also with the coming smart contracts.
I'm not sure about ADA, ADA doesn't seems a promising project to work with the smartcontract. We didn't even need a lot of smartcontract platforms.
Yesterday ethereum was facing a problem with ethereum berlin hardfork and that makes the network was stopping for a while.
People are betting a lot on the new ethereum upgrade but I should remind you that dude if ethereum is not go high like what already expected by people in the past.
I will try watch the result from the berlin update