Not realistic if you run a business that actually operates in the real world.
I'm not sure what you mean exactly. Rome was not built in one day, but with small steps. If you wish change then you take small actions that of course do not build a palace today, but might do in 10 years.
That basically translates to use bitcoins alongside dollars and slowly transition to bitcoins only.
Why are bitcoins a solution to a corrupt criminal justice system?
Yeah, I've never understood the logic that using Bitcoins insulates someone to the normal financial system. If you want a loan, put money in a bank account, or hedger risk, or do anything with your money that isn't just moving it from address to address, it is still needed to have banks.
Or have cryptocurrency fans figured out a solution that I can't think of now.
It's similar to the idealist trope that tearing everything down to rebuild it will somehow not be subject to corruption and perversion the next time around. As though they've found some way to control human nature. It's unavoidable systemic entropy.