Signed copies with clear authentication can sell higher
Competitive Gameplay : TCGs are inherently competitive, with players building decks to outsmart and outplay their opponents
This doesnt mean that all the cards in Ultimate Masters will hold their current values they absolutely wont but if youre looking for an Imperial Recruiter situation where a $300 card drops to $28 simply because there werent enough copies to go around before and there are now, you arent going to find too many of them here
GX, 5Ds, and ZEXAL worlds to Duel Links, and with those worlds came new Fusion monsters and the addition of Synchro and Xyz cards
Of course, more pack openings will likely lead to new deck-building potential and therefore more victories in battle, netting more rewards which, in turn, allow for even more pack openings