I read your post and while it's vaguely on-point, it in no way demonstrates or explains that what you are advocating is not utopian. You try to explain why you think it's moral. The question I asked you is why you think it's feasible in the way you describe it. And as you said, we did make it personal, I gave you some very specific examples and I haven't gotten a convincing answer yet.

Let me answer the questions paragraph of your post here:

Since you’re scared of how ‘the market’ might handle things, and since you don’t like the idea of society being based on the non-aggression principle or purely voluntary interaction, then I have to ask, which involuntary stuff do you want forcibly imposed upon ME?

Contracts, not infringing on other people's rights, rule of law, punishment for crimes and the taxes necessary to make that happen. Of course the word force is overly-emotional in this case.

In which cases should I not be allowed to spend my own money?

In the cases when you want to spend it to illegally harm others. Like a business venture that would pollute everybody's water, you hiring an assassin to kill me, or knowingly buying a stolen item to name a few.

Which trades and decisions would you force me to make, instead of letting me choose for myself?

The above. Or fraudulent ones where you want to defraud other people.

In which scenarios do you want ME to be violently controlled when I haven’t threatened or harmed anyone?

In none.