If you can not research and decide for yourself you should not be buying any of them. You will not get good answers here asking this so do not bother.
Yes, you are right with it mate. It is very hard for to invest into altcoin if you have a feelings of doubt. Much better not to buy than you regret in the end. Follow what your hearts will. However, for me altcoin was really a good thing to apply by simply buying those coins in the platform exchange site that are really potentials like Nem, Ethereum, Waves, Maid, and of course Bitcoin.