Altcoins are really scary, if you can do some research you will see many good altcoins that had very good start and value in 2018 and are still alive today but we never heard anything good from them anymore for some reasons, they are now like ghosts, honestly altcoin investment is more scary, this is why its better to always take profit, most especially from new altcoins, Profit is Profit, either big or small.
It's why I don't like holding altcoins for too long, they lose value when you least expect, the best time to start buying altcoin is when bitcoin have surge to a new all time high because once dominance starts losing steady whales will take advantage and pull the profit from bitcoin into altcoin, talking from experience, when bullrun is alive is the best time to start buying altcoin