It is better to invest in ETH than wave because ETH has the tendency to increase in price and realised more profit while most of the time wave depend on ETH to rise in price .
each person will certainly be different, Ethereum and Waves are the same as a platform, and of course Ethereum is better, but don't underestimate waves, waves are very good in the development of the project, and have already seen, especially with the ROI that has not gone up, the potential for investment in Waves will be better than ETH