It depends on the how you want to invest it.

Bitcoin is the strongest and most popular currency, it may oscillate but prices are bound to come back to a stable spot. It is probably going to become more valuable as it becomes more popular.  So if you want a safe place to park your coins, bit coin is probably what you are looking for.


Litecoin is less popular, so it is hard to find places where you can buy stuff or change back into cash. There is a lot of room for growth but the road is probably going to be bumpy.  Litecoin is a higher risk long term investment.


Other alt coins can also be invested but you need to watch them closely, it is not a bad idea to stock on a few cheap currencies and see how they develop.


The higher the risk, the higher the rewards.