I disagree with large corporations like mastercard being awarded crypto patents.
Patents can be utilized to repress technology. Oil companies owning the patents to nickel metal hydride batteries and repressing battery technology is one main reason why electric cars did not become mainstream until after lithium battery technology was developed. In that instance the patenting process stalled innovation and progress on electrically powered vehicles for literal decades.
There is a potential for mastercard or another financial institution to repress crypto technology by being awarded patents which grant them exclusive use over the technology then opting not to do anything with the technology for the next 20 years. If anyone used the crypto technology covered by their patent, they could sue them in court and they would win.
I understand your point, but it doesn't really matter anymore what these corporate clowns come up with.
In no shape or form can they do anything to suppress Bitcoin and other cryptocurrencies, only the centralized ecosystem around it to a certain degree.
We're in a whole different league now. We don't depend on corporations anymore. Instead of we worrying about what they will be doing in the next years, they are worrying about what we are doing in the next years. In other words, we have the freedom to discard their services and people slowly but surely start to understand the importance of this.
In the end it's very simple, the less we use their products, the less powerful they are. We allowed them to grow this large and Bitcoin can and will end it.