You can invest a part on Alts: Litecoin for example.
litecoin? you are serious? is better to invest to anything else like dogecoin or dash..
wait what? i always thought that litecoin is the best cryptocurrency after bitcoins isnt it?
i don't know about Litecoin being the best but it has the second highest trade volume according to
http://coinmarketcap.com and also it attracted a lot of people but i think it is a dying coin and certainly not a good investment for long term.
you should stick to bitcoin for your majority of investment and if you want to buy altcoins too, try investing in a couple of them. but so far i found out that none of them are good for long term investment.