The key is to do your own research. I agree with the quote above. There are two types of coins, those who hope to replace bitcoin with newer technology and those who fill a niche.
I am not a day trader but a longterm investor, and frankly there are so many coins offering new technology in hopes of competing with Bitcoin, I am not smart enough to pick the winner of that race, if there will ever be one
So I hold longterm positions and accumulate more when the price swings. My top picks are AppleByte, which supports the artist community and Gulden, which is gaining a foothold in the Netherlands. I also hold Doge from way back, as I like their niche in social media tipping.