I think cardano is good for you to recommend, because ADA is one of the fastest growing altcoins right now, moreover this project has launched their own smart contract, so the chance to get a profit is very high later, if you believe then now the right time to start investing with cardano before the price goes higher.
Yes, I highly recommend Cardano too, and it's indeed very wise to invest and take advantage of this coin now because it's currently dipping to have a chance to gain some serious profits soon. You might not see this much dip again in the future. Also ADA is one of the top performing altcoin now next to BNB, no doubt.
I really discourage nowadays to invest in ethereum, that kind of market was deeply manipulated by a lot of whales who pumps and dump any minute and also their gas fee is getting so expensive now.