Litecoin is a good choice to invest but the more you will invest, the more you might loose. So, I'd recommend to split up this sum of money to make an extra profit and decrease your risks.
I think it is good time to buy some bitcoin diamond(BCD), though it is a forked coin from bitcoin, it is supported by almost all the exchanges and now the price is very low in my opinion.
Indeed, new bitcoin hard forks will be rather profitable investment