Ethereum- Risky, their price is high because so many people run ICOs with them, ICOs will definitely get less popular now as most are junk. EOS also hold a fuck load of ETH and could crash the price by themselves, which they may do seeing as they're building a competitor to ETH lol.
Ripple- I have a decent amount with ripple, still more risky than litecoin or bitcoin though imo.
Bitcoin- would wait for a dip first.
Litecoin- I'd go with this for long term if I was picking 1 of your 4. Check out IOTA aswell.