...or by the family, or by their investments, or by charity.
Not by hoarding currency
I have used some of those words in my text here but unregulated isn't really true. Bitcoins is the most tightly regulated currency in the world

It is mathematically regulated which frankly is key to its success. Who the heck would use a currency which is completely unregulated?
In fact part of the failure of the US Fed and some other modern central banks is their de-regulation. They are no longer controlled by set standards or by the democratic process but by a pseudo-private, quasi-secluded council which is "independent" from government policy.
Ahh...someone who actually understands what the term regulate means.
Your professor would not. In liberal speak, to regulate is to use the government to make something better.
As opposed to during the days when your rifle would be "well regulated" if it was in proper working order and checked to make sure it would shoot if needed. It was that definition they meant when talking of a well regulated militia in the Constitution.