So... I'm right now keeping max 5 of each character. Anything more is sold off eg. 15 Harvey, sell 10. 6 Istasis, sell 1.
Is it worth holding on to that many cards or from what I've seen some people hold onto 3. I've heard of some holding to insane numbers.
Keeping 5 is fine in case some of the cards end up cr and become super expensive
if you want to play the market though, you are going to need to constantly buy more cards and really invest over a specific few cards so you will need like at least 10 of each
if you just want to play UR and not worry about the market, then 1-2 of each is fine, 3 being the 3rd copy that you can sell without worries