What encourage me most in investing altcoins is its potential for huge and fast growth, altcoins are known to increase as much as 100x in one day, although much more risky due to the fact that there are those coins which just vanish in mid air. I think the key here is study carefully  the coin you want to put your money into. For me, I just want to to work in high risk high rewards project, I just like to gamble.