Choose Ethereum because it is the second coin in popularity. I consider bitcoin as gold, Etereum as silver. I don't know about bronze. But I wouldn't begin to consider Waves as bronze. I think that it will show that the future will show it. And on ETH based all altcoins
yeah who knows how much waves will grow. not like ethereum growth, waves seems too slow. even on top 100 not guarantee a coin will have bright future. but u know about eth .