I think for longterm investment i suggest for you is ethereum because ethereum is the one profitable longterm coin and it is good to buy for now and hold because the price of ethereum for now is cheap price.
for those who hold coins with ETH platforms, I think they will now hold their coins in the long run. well, we know the price of ETH is really decreasing at the moment, so I think it's normal if we hold coins for a long time now.