My friend, have you ever played Magic the Gathering? It is the same theory, you buy boosters to get cards to make decks, so you can win championships. If you are really good, these tournments could give you good cash prizes. If you are not good (that was my case) you would spend almost a fortune to have all the necessary cards, but, as you lack ability, you would end with the cards and nothing more. I have Magic cards that are worth hundreds or thousands (only few) dollars and are now in albums, to not be played anymore.
Why am I telling you this? There are millions of Magic players in the world, hundreds of tournments every year and only a few get some money.
You say that the price of the cards will rise. Why? Only if a small quantity of cards prove to be necessary for you to have a greater chance to win and these cards have a very small mintage. Of course there must be thousands and thousands of grown-ups that will spend thousands and thousands of SBD/steem to obtain these cards and try to win a part of this money in tournments.
There is another problem: we don't know how to play the game, so we don't know what is important or not and we are spending fortunes to get all the cards.