Well, what happened to me is I bought 12 packs and I got some good ones, including two buses that gave me 550 fans each. After that, though, my fans were about double my skill and my ego was going up quickly. If you don't have too many fans yet, it's not a problem.

What I did is send the NFT cards to another account I have for storage. I should probably double-check and make sure this isn't going to get me in hot water, but I think as long as I'm not playing with the other account, I should be allowed to do whatever I want with my cards.

I sometimes buy cards on the market strategically, though. I look for affordable cards that give more XP and fewer fans to increase my skill without driving the fans up too much. You want a lot of fans eventually, but I think there is definitely a possibility of having too many if aren't that far in the game.

I do the same thing with dCity. I had too many workers and my unemployment was up, so until I could buy more cards that would require workers, I just sent them to my Rising Star account for holding.