Well I dont think the dump will be as bad as you think. The higher lvl bots will actually use and lvl up the soulbound cards because it will lower their overall rental expenses. I dont think you will have accounts just saving up hundreds of thousands in CP reward cards just to sell in 2 years but I may be wrong.

Regardless something needs to be done about the rental market, nowhere on earth can you rent 5k worth of an asset for a dollar a day. Idk if that means we super over value our cards or we just have crazy circumstances but it would be like renting a car for 5 bucks a day.