I'll go for Ethereum, Litecoin and Bitcoin. I believe Ethereum and litecoin has more chance to grow in 5 years then Bitcoin. Bitcoin is the pioneer but has flaws and those flaws will make other currencies go past it soon. In 5 years time i think bitcoin won't be the champion it is now.
maybe the big and unknown decider is how traditional markets and institutions decide to treat the various coins.
they may decide bitcoin is
it and everything else is of less interest to them. in that case there'll be a two tier market. or they might decide everything in the top 20-50 is fair game. ether way they will have no interest in any coin's use as a currency.
I don't trust any newest coins. Old guard only
this is wise. i might be inclined to put a small fraction into newer stuff but i would have the full expectation they'd be worthless when i came back. there are certain coins that aren't going anywhere no matter what but not many. i'd say 95% of everything on coinmarketcap will be dead and forgotten by then, maybe more.