I always go for the safe options like Waves, Stratis, and other top 50 coins in the market. I think they're still cheap and still got the capability to grow in the future and really good for long-term holding. I also want to consider buying coins that are under $1.
Major coins have a major chance of growing too.
Waves and stratis are good coins, I believe when the alt market will be bullish again, but now since it's the first major pump of bitcoin, it's expected that altcoins will dump, however one should not see it bad, it's an opportunity so let's be smart and buy altcoins now.
The top coins are a good choice, but don't just judge automatically, look for cheaper coins, take higher risk for higher reward, as long as you know how to manage your investment, you have a chance as majority will certainly rise as the bull run commence.