For me, Waves is one of the potential altcoins, actually I believe in the future Waves will grow strongly and have a high price. But Ethereum is a giant in this market, its capital is huge, just after Bitcoin. Ethereum is very popular, it is used by many ICOs. Every day Ethereum has a large trading volume. I believe in the future Ethereum will reach over $ 2500. Actually right now, it's hard to have a strong enough altcoin to beat Ethereum, Waves will need a lot of time and effort to beat Ethereum.
Ethereum is not something to get killed by another blockchain project. Waves is a solid project with trusted team members, yet waves can't kill ethereum, it can take some market share from ethereum. This is more realistic.