There's no particular check on knowing whether a coin is good for an investment or not, everyone is doing their own research base on the way they can afford for the risk involved in making any crypto investments, if you don't have a thicker skin, then don't even go near them, because they are now using the public figures to create the hypes needed and later acheive their fitious ambition for scam, Trump was not only involved here, take a look on the recent saga with the Argentina president, people are now seeking for his impeachment for that he did, risk is everywhere, of you can take it, go for it, but if you can't bear the lose, better don't invest at all, everyone needs to do his own research before investing on any crypto project.