I am pretty disappointed with all new coins as well, because there are scams everywhere even if those projects seem to be legit. I am investing in proven altcoins like ETH, BCH or LTC, because I am sick of losing my money with all those potential altcoins.
That's partly true. If you investigate and evaluate the project correctly you can make a profit from any good coin. But definetely prefer to stick with proven ones. My top alts NEO, XRP, XLM, NWC...