Your example of the police department is actually a reason why so many people are looking at crypto. Current fiat while being a means of exchange is also a method of enforcing government control. The governments enforcers of state sponsored violence are now allowing you to pay their arbitrary fines via a method that directly connects to your identity. At the same time the IRS is now requiring that centralized banks report all transactions of greater than $600 to them. This will allow them to more efficiently tax the poor and middle class, the rich probably dont care about $600. Get pulled over with a large amount of cash in the car and the police and seize it and then you have to engage in a costly legal battle to get it back by proving to them that you are not a criminal. That's if you can even afford an attorney. Today's centralized system is very much about enforcing government control over the individual on every level. For some crypto is just a last gasp at trying to get some control back and the pitfalls and complications are worth it.