I hope every coins is a good, but you must learn and see about the market of that coins. Actually for me 3 coins are good : bitcoin, ethereum and NEO.
That 3 coins the price up faster than the others, so I suggest and you can choose to invest of 3 of that coins.
This is some tips to know the coin have a good future;

# Read the whitepaper to know all information and the track of the project if it is achevable and realistic;
# Check the market capitalization;
# Roadmap and long term use;
# Partnership;
# Reach the admin and developer through their official telegram group;