But Zil is one of the top altcoins in the rankings that you probably have considered because of its status. With its good position that we have right now, there's no one that can assure what will be its position for the next 4 years.
The only reason ZIL is in what you call a good position on CMC or coingecko is that there are like 16.5 billion coins in circulation and one coin happens to have a relatively high price given how much supply there is. I think the reason why ZIl hasn't fallen to the price of something like Raptoreum which also has a max supply of 21 billion is because it's possible to stake it.
Last I looked, the return was decent using atomic wallet although the structure of locking/unlocking your coins and the fees you incur in doing so is just goddamn annoying.
I agree with all the other brainlets here that hodling onto a shitcoin for a long time usually isn't a solid plan, but ZIl might be one of the exceptions. There have been many of those since the floodgates opened years ago.