It isn't a bad idea to invest only in ICOs but most of us here fear the possibility of the project ending to be a scam. If it were hodling, most of us can hodl till death but if we don't get our monies, how can we hodl, that is why some of us will want to buy more coins when they go on exchange.
Well, I am not advising against investing in crypto but my little fear is what I told.

The unhealthy and fried junk food should be avoided rest everything is good.