Earlier quoted context omitted.
This is how every bank works.
Except banking is highly regulated and the money not held in reserves is invested with oversight on how much risk is taken (that oversight fails sometimes but generally works). If a tech company can jump in and function as a bank without oversight that is going to hurt banks. History has shown us that unregulated banks, and regulated banks that push the limits or evade regulations fail and cause damage to the entire…
I have no interest in protecting banks from businesses that act just like banks, and then get punished for doing those things, only because they are not legally considered banks. The last time banks pushed the limits, failed, and caused damage to the entire economic system, it was 2007-2009, and no one was ever held individually responsible for it. I haven't forgotten or forgiven.
So yes, please. Hurt banks. Protecting them just turns them into privileged asses. The "tight regulations" function mainly as their cartel membership rules.
Split tally sticks worked as privately-issued financial instruments for centuries, before banking lobbied to have them outlawed. Banking works better (for the banker) when there are no lawful alternatives to the bank's notes. A cryptographic equivalent to a split tally stick is very acceptable from a historic perspective.