As an investor, i did a lots of invest in altcoins. Those were suppose to be good that time with having good hype, good team and community. But with having all of thats, most of altcoins scam after a time! I wonder for some altcoins, they were suppose not to be go but they scammed without any reason! And hundreds of altcoins are in my wallet, which are turning into dead shitcoin now.
It's very easy to spot a shitcoin, just take a look at their website and what team are behind them, also take extra step in researching individually about those team member if possible go through their social media and other contacts that may be available on the internet, by so doing you will discover a lot of things about the project and who are behind it.
When a project promised what look unrealistic then it means that the investor should be sure that holding them is amounting to holding another worthless coins that will end up being spamming your wallet.