In reality, crypto's true purpose is a moving target, so it can never be criticized because that's not what crypto is really about.
Bitcoin is a tool. Like hammer or a shotgun. You can use it whatever way you want. There is no centrally defined "purpose".
Any infrastructure has a purpose. It’s fair to ask why Bitcoin exists and whose project it is.
Hint: Millions of people use Bitcoin as a:
- store of value to protect purchasing power over time
- inflation hedge to protect savings from the ravages of inflation
- a hedge to protect against corrupt governments manipulating currency
- protection from negative real interest rates
- censorship-resistant payments
- anonymous payments with instant finality (Lightning)
Money is a tool like any other. Cash, gold, NFTs, Bitcoin, and credit cards can be used for good or evil, lawful or unlawful purposes. The technology isn't inherently moral or immoral. It is just a tool.
The "it's really for nazis" argument is particularly weak. The critics must be getting desperate.
Anyway, I'm not saying that. Eichmann is simply a reductio ad absurdum example of the problems with the "it's just a tool / technology has no moral" position.
Guns = good
Cryptocurrency = bad
Opinions I agree with = good
Opinions I disagree with = bad
Me getting mine = good
Someone else getting theirs = bad
Censorship is the battleground issue for the 2020's.
^Apologies for the lumping of 300 million people into a single sentence description, it's for the sake of trying to make a point of the entanglement of "the US" and "freedom" - which isn't a bad thing.