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IcaroRibeiro said:
jason1637 said:

But these credit cards are backed by physical currency and transactions go through banks.

Then I don't understand what is the issue. The problem with physical currency is it's expensive to produce/print, but you don't need to print every piece of money traded. Most of money today are nothing more than a series of bits stored in traditional HD databases from banks, and those don't need such high energy consumption to keep 

The issue is that the banking system you’ve mentioned consumes a lot more energy than something like Bitcoin. I was just making the point to emphasize how crypto is unfairly criticized compared to the banking and physical currency system but that has its uses so it’s dumb to get rid of that like how NFTs have its uses with blockchain contracts so when done right it’a great.