The main issue Cardano has that it will eventually grapple with even in the event that it should succeed is that it provides for unequal access to information about metadata of transactions. This is a feature that is presented as providing some utility and solving some problems but it is not the best way and eventually leads to centralized control through regulation as nearly admitted by the creator himself. He says that information is useful to regulators but by not providing it to everybody it preserves privacy. This is a partial truth. If the information is available to some but not all it naturally concentrates and centralizes around those that it is available to over time. The better method is to design for the system to regulate itself well without human intervention and prove that it is not necessary.