Crypto isn't bullshit well most of it is but the utility is still used by millions of people around the world, specifically USDT and USDC which they proven a good way to move your assets without too much regulations.
So it is regulatory arbitrage. I think many of the critics never contested that crypto is good for doing crime. The critics just also think that either those crimes should continue to be prevented via the financial system or the financial system should be deregulated for all without a crypto backdoor.
A Money Market Fund gives you interest if you are able to access it.
This is kind of a pattern:
1. There is some regulation that is inefficient ( e.g. taxi medallions, KYC, copyright protection ...)
2. New technology comes about which allows startups to claim that they have invented a new area that should be regulated differently
3. Turns out (2) is not true and new technology can easily be mapped to existing regulation but it would look bad for the regulator to take away the punchbowl
4. There is some down-turn (bubble pops) and the regulator takes away the punchbowl OR investors have accumulated so much money/power that they corrupt the government to have new rules for their businesses
For example Telegram they have two app versions one in playstore where google can dictate what channels are allowed and one on their website where google can't force them to take down channels, so now Google will need to approve Telegram second app to be installed on Android?