No I don't think any altcoin is worth investing into. There is a lot of scam coins and shitcoins that are beyond risky to put money into. You've got the overly inflated POS coins where if you get in to late you're basically screwed because it's more than likely to drop below 1 sat. You've got shitcoins that end up abandoned by their developers which then they either die out due to being removed from exchanges. That's just a few things.
When it comes to altcoins, you're best researching and looking how long it's been around, how many exchanges it's on, whether the developers are active and involved, it's volume, it's liquidity many other things to consider as well. For an example, dogecoin is an excellent altcoin. You never know where it's going. It's either sometimes between 20-100 satoshis, so basically whenever it's below 40 sats it's probably a good time to get in.
This might be true, however, best trading opportunities lie within shitcoins. You won't be able to flip top 20 coins/tokens for 100+% profit, but with certain shitcoins, you very much can. It depends on your trading expertise and the market situation. You will be stung by some, no denying there, but the profits you will make are worth it.
As for the OP, I won't direct you to a specific X coin or Y token. Just start with safe, top coins/tokens. Buy when they dip, sell when they risepretty safe approach, but it will get you on track.