There is no such thing as "best coin/token" for trading. It will completely depend on your trading style and what indicators you're using, and obviously it won't be the same for everyone.
Yes if for trading concern, you have to follow what this user has said and that is the way trading is. Trading is not concern to any coin but strategy for you to know when the price can go up or down and apart from that, if you talking to hodl, you can look at coin volume or circulation. Bitcoin and etheruem are good to hodl.