New coins are very risky, don't invest long term there, choose projects that are clear.
like Waves, Litecoin, Ethereum, you will be fine
Ethereum doesn't look good, especially after ETH 2.0 got postponed. The other two coins that you had mentioned (Litecoin and Waves) have lost more than 90% of their value since 2017, and not too many people are investing in them. Their trade volume, as well as the mining hashpower is on constant decline. Investing in established coins may be a safer option, but the ones you had mentioned are not suitable for that purpose.