Is Bitcoin an investment, yes.
Is ETH an investment, I don't know, maybe. Maybe it's totally worthless some day.
It is an ecosystem that has some interesting dapps to mess around with. A tool to better understand what's going on in blockchain & tec.
So to me, shit coins are no different than owning an expensive mountain bike or some other nice to have but don't need to have toy.
I love the saying because it is true. Can't find out if you don't fuck around.