A lot of discussions on forum are all about "what coin should I buy? Why?"
Here's the opposite - I want to ask what alts you would never buy and why so.
My example:
Never buy BTT, Tron, Stellar and other coins where the tokens are giving away with all kinds of airdrops. Why? Emission grows with no influx of investors.
Doubting about Peercoin. Hybrid emission system doesn't seem reliable too, though lately PPC began spreading itself via well-known exchanges (changheangel or changelly - don't remember).
+ Libra. Not sure if any explanation needed.
In my case I will recommend people to stay away from bitcoin cash and many other bitcoin forks, I do not really have problems with forking projects since this allow us to see which one is the best of the two, but the people of bitcoin cash were claiming they were the original bitcoin and that is not true, they are a bitcoin fork and nothing more and many people lost their money buying that coin when they thought they were buying bitcoin and that is not fair.