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.
I will invest the Bitcoin to ethereum, EOS, TRX and LTC. These are most promising coins and we can expect the growth for long term most of the time our investors comes with different investment strategy for short term trading.
For long-term we can plan like this and invest the hard earned into these coins to have good returns in future.