Ethereum should be a very choice. If you are looking at investing now, the price has plunged. You can just wait a little more to see if it will plunge more. If it does, wait a little again, but i am of a candid opinion that you buy now, because it will rise again.
Agree, Ethereum is more than just a cryptocurrency, so much projects based on their blockchain, exchanges, ERC20 tokens and so on, i hope it would grows to 2021.