Do some research on top altcoins value 5 years back and use that to judge what their values are today? Saying holding is a imagination is wrong, even those who buy coins in 2020 pandemic period ( A year ago ) are glad they did because they did so well, the truth is you have no problem if you hold the right coins and tokens
Holding 5years is a win wn situation,it test your patience as well it makes you earn but will atill depend on what coins we have, we can track ICOs or coins tgat are listed 5years ago that may not be around anymore so if we plan to hold we must still be updated on the happenings of that coin, we must know if there are changes plan or improvements to make to keep their coin last for more than 5years.
holding back 5 years for a new project is too risky. we probably won't see it on the market in 5 years. we can see so many altcoins having such cases. only survive in 2-3 years of initial development they then disappear.
for the long term, why not choose a popular asset that has been proven to last in the market for a long time? I think it will further minimize the risk of losing the value of our investment.