Which one of them has the lowest potential in your opinion and why?
It was a tough choice, because the 6 coins you mentioned have high potential.
But, if I choose whichever is lower I will take it based on the level of popularity, the coin is LUNA.
I'm not saying that LUNA is a low quality coin, but compared to others it seems that LUNA is less popular
and if I were you I would sell LUNA first if I needed money urgently.