If cartels form it is because of collusion between governments and special interests. Walmart and other big companies like that could get into the crypto market and with the political power they have because of lobbyists they can certainly create trouble in the market for the rest of us. That said decentralization will work best when you can get enough people to stop believing in the facade of centralization of everything. That will take time, but as more and more people wake up the closer we will be to a free humanity. Crypto will do better in free societies as people will do better. We want to succeed which is why we want crypto to succeed so we need to work on being as anarchistic as possible to move toward a free society.