One of the main reasons many people are willing to put money in the game is because they not only anticipate being able to sell at some point, but they also believe card prices will hold up and even go higher. Without this belief, it just is not worth it knowing you most likely will lose money over time.

THIS!!!

I lost a shit ton of money on CHAOS cards. I thought my Riftwatchers cards would hold up better but they fell in value too. They focused so much on making Runi go up in value but most people's biggest holdings in this game is cards!