I do trust some erc20 tokens, we just have to be wise and do some research before we invest. Well, if you are looking for a trusted and legit erc20 token i recommend staker token, they got a huge community in discord which are taking part of the airdrop also an active dev team, staker has a unique feature , it's a smart contract proof of stake token.
Yeah, the simplest way here is to choose the best among the thousandths if choices. ERC20 tokens are very risky to serve as an investment because there is no assurance that your money will ever be able to earn profit. But that's just one fact, we invest even though there is a risk that's what a true investment is.