Describing a shitcoin varies from person to person. An alt that made you good money doesn't mean that it's a promising one. So please be honest, and if you ever have to sell your btc, what would you buy with them?
My first vote to Monero, for privacy reasons. Fuk ZEC and its "optional privacy" which is NOT a privacy actually. DASH? Lol, no privacy. Another bitcoin clone methinks.
Second one is Ethereum, there is no serious competitor in smart contract area.
I cannot find third one. Maybe NANO.
Well if i will sell i will go for the next coin which will be ahead and based in charts because i will be more cinfident to support other altcoin when i see its chart if it will offer a good reward in the future along with its actual development. I don't like hodling or buying any coins right now until i saw the opportunity thats how i buy this top altcoins.
Instead of changing your coin now and then, would not it be best to stay with the one true potential asset. That is a way too much work to keep an eye on charts of many altcoins, figuring out the next promising one and switching to it. Also, none of altcoins are very good at producing profits. I will suggest you to invest in bitcoin and you will not have to go through the above tough routine. Profits earned will b more than satisfying.