I advice you to just invest some of it into at least 2-3 erc20 tokens with potential like Cardano(it is just an example so don't take this as as potential coin) but before investing, you should do your own research and be responsible enough to pick those yourself, do not ask other's subjective picks as you might lose your money. Just remember to keep at least 1 ETH into ethereum. IMO eth is one of the coins with a potential for growth in the next coming years.