In my opinion, the current currency system in our world is the most unreasonable 50 years in the history of human civilization for nearly 5,000 years. Various sovereign countries continue to issue legal tenders without any physical value support, and they are still in the process of continuous over-issuance.
It is unreasonable but it is effective and for how long it has been in our civilization, I think that we will have a hard time uprooting this system because it's coupled already with the global economy and global supply chain and what happens when we take away a keystone to those things, it will eventually collapse, it's a parasite that we can't remove.