If you you're interested in ICO's, you're few years too late to this train. Now there is DeFi projects on the wave, maybe it's worth to take look on it. But I'm not familiar enough with it to suggest something.
It also depends on how much money you want to invest. Like mining, it requires big investments, cheap electricity, and in the end returns that you'll get isn't that big.
It's difficult to suggest something specific for investment when I don't know what range of money for investment you have. It may be $10 000, $50 000 or just $1000.
HODLing isn't worst option, considering how much crypto went up in recent months. And at least you're not risking to lose your investment