The future is unpredictable, when you write this post Luna is very convincing and would never think it could happen like today, and I'm sure that what happened with LUNA could happen with any coin that we might currently think is impossible, this is what makes I don't like long term hold.
Anything can happen with the cryptocurrency market. This is the reality and we've got different experiences on different cryptocurrencies. The latest being the Luna, which is at a good position. In no time things changed completely upside down. All the coins mentioned by OP are really potential coins with long term growth expected. However I find these coins to have less chances of being like Luna.