You would make more of a higher percentage buying more Waves than buying 3 ETH. Waves is more likely to triple or even 10X, where as ETH might only double at best this year. Just my opinion. If you're looking for a short to medium term cash out I would suggest waves. ETH is solid though and unlikely to lose its hold as one of the top 5 coins. Waves is good long term hodl too as it will not only rise in price but also pays something similar to a dividend for holding.