Referring to Scambrain explosion allegation in the HBO movie, I find shitcoins useful in a sense that you can sybil shitcoin networks and get an airdrop, and then swap the shitcoins for BTC.
If you can do it, then go for it. But I don't think shitcoin airdrops are a great thing to do these days - usually the rewards are small and you need to do a lot of tasks to get the rewards - but I don't know, maybe there's a shitcoin out there that gives high rewards to its participants, if you can find that, then go for it, but I personally don't find it worth it these days.