Rather than investing in any other altcoins the best and most reliable and trustable crypto-currency to invest in is the bitcoin itself.For term its the best and for short them trading with bitcoins can also be profitable.For long term investement i am also investing only some small amounts regularily in Litecoins so that can also be tried.
Bitcoin is to expensive for normal earners like us. Instead we want to enter cryptoworld in a lesser investment which we can afford. That is why we seek on possible promising altcoin to invest in that has a potential to be like bitcoin someday.
As for me I think one good coin to invest is Vcash, this coin is very cheap at this point with solid development.
you can invest small amount in bitcoin, there is someone telling you that you must buy 1 whole btc? no, but investing in bitcoin will not make you more coin if you don't trade i agree, with altcoin you can invest your bitcoin to earn more with the correct choice of altcoin, and btw vcash is an ancient relic better to focus on new altcoin