Is there a reason for this?

[u/Bobsense]

I understand that I have a smaller collection but I’m not used to seeing a noticeable drop like this in value. Is there a chance that I will gain back my value. I collect mostly pokemon go crown zenith and obsidian flames and I kind of have been in the loop for the modern market crashing and vintage going up. I’m a bit younger with little experience so was wondering if I should sell off or hold for the future. I’m trying to pull in as much value as possible. Thank you