Sporting a shitcoin is not as easy as we think. Some projects actually do have some product but their marketing strategy doesn't fit the project thereby making the price dump heavily. Others have a locked source code while some others have major tokens in the hands of developers as they didn't do any ICO to sell their tokens. Its a complicated process identifying a shit coin.
Almost all ICO coins is now a shitcoin, i have many coins since 2017 and they don't even have a value right now or some of them had been dump it's price so deep. If the don't project have potential use case the project will eventually failed and their coin will be a shitcoin.