I recommend ethereum because the coin is very useful (smart contract ethereum) is one of the facilities he has. Very useful for the future and I believe the value of ethereum will be worth several years ahead. So set aside some ethereum now
Ethereum is really very useful and with the recent upgrade that is coming up, if all things end up working fine, then it would really make more impact in the crypto world and it is really going to get big in the next few years as well.
This is a coin that has given birth to so many other coins in the form of tokens and apparently aint going anywhere else but up.