realistically speaking, tax evasion and purchasing things illegally, and money laundering have all been around and significantly well established with real currency well before cryptocurrency came along.That's just inefficient complicated solution to imagined problem for people who wear tinfoil hats or want to purchase illegal stuff/circumvent taxes. Or maybe I'm just naïve and live in a soft bubble of trust in stable society.
The only difference between virtual currency and non virtual currency is that with non-virtual currency, they are doing it in plain sight. With nothing more than a slip on the wrist fines and constant lobbying to change laws so that they can get away with these things.
Everything in real currency is leveraged well beyond what is actually available. The entire financial system has all sorts of mechanisms built in place that literally is just another form of legalized gambling. Nothing at all really makes sense.
Where cyptocurrency is basic, it is also immutable in how it functions. There is at least stability in that.