You know police in many states in the US get uploads of all pawn records and metal recycling to help track down and stop thieves from making money on stolen goods.

There isn't one root cause, there is an environment made up of multiple factors that allows bad behavior, one contributing factor is how cryptocurrency has enabled large ransom payments to bad actors over seas.

Software should be made more secure, but making it 100% secure is impossible. How much time and money should be spent on the software security side? My house isn't made like a fortress, its security is actually pretty minimal, it doesn't need to be better because laws are enforced and its not anarchy outside, its a low crime environment due to multiple levels of protection I don't even think about or manage directly all provided by the government. Part of those protections is making it more difficult for criminals to profit off crimes, though not impossible, it's just one aspect of a defense in depth.