What does this even mean? If you were to add all the energy consumed by the financial sector? What energy does the financial sector use? Second, the criticism on Bitcoin is that it uses all this power for virtually no good reason. It is necessary based on the way it is constructed to consume all this power to run the decentralized network, but essentially nobody needs the decentralized network because it's not solving a real world problem that was needing to be solved. Centralized systems do what Bitcoin does for such a fraction of the power needs it wouldn't even be measurable. That's the criticism on the power front. The analogy to the financial system is puzzling because the "financial system" isn't a defined network like Bitcoin is, and the power consumption by Bitcoin relative to the utility is so overkill that the comparison on the face of it seems ridiculous before you even look at any numbers whatsoever.
It means exactly what I said, I have seen some calculations that put the financial sector as responsible for the use of 12% of the energy of the whole planet and if bitcoin were to take its place it will be more efficient, so all of those that say that bitcoin is unsustainable because it consumes a huge amount of energy are lying and are trying to use the excuse that bitcoin is not green enough to stop its adoption, but it is not going to work, and second bitcoin uses all that energy to secure the network so it is not useless.