Good article and I sort of stumbled onto this whole card collecting thing. Only collected basketball cards when I was a lot younger. If the budget is unlimited, you can be both a player & investor, but in the end it does depend on how much time you want to put into being either.

For me, I bought a few Oshannus for the sake of renting them out so I feel less guilty about renting the more expensive cards I want to play with. My goal is to get to a point whereby my rentals out = rentals in so anything I earn in game is a testament to my skill (or lack of).