The psychology of regarding coins as shit coins until they blow up and become too expensive is common among newbies. Even myself I am guilty. Enjoy the bull run guys!! Remember to lock your btc or swap to a stable coin like usdt. Good luck
A shitcoin is not a cheap coin, it's a coin that doesn't have any utility, innovation, development, usually all it has is aggressive marketing. They also often have severe flaws that make them centralized and unsecure. It's irrelevant what their price is, even if they rise x1000 they are still shitcoins that are doomed to become worthless in the long run.
And selling BTC for USDT is stupid, Tether is centralized and could crash at any moment with no protection for holders. Better stick with traditional banks if you deal with fiat, at least they are fully regulated.