You just described GOLD.
Also, you think a force can protect value in a currency?
Sounds like protection racketeering to me.
As we witness for the last 100 years...... it can. Most of USD value is coming from oil. That's why it's called "petrodollar". The scheme is simple: You find a commodity that is necessary for the world to function, and which can be guarded from everyone else, and make it available only for your currency. Currently, that commodity is oil.
For example, if you go to 90% of the oil-rich countries and wanna buy tankers full of oil, you can only do it for US dollars. Because the regimes in those countries were either installed and instructed, or blackmailed, to only accept US dollars. You can't buy the oil for euros, pounds sterling, yens, yuans, etc. Just dollars. Which creates artificial demand for US dollar, which artificially increases its value.
So, what happens if someone starts selling oil for euros and yens, for example? Well, Saddam Hussein and Khadaffi were among those. And look what happened to them. Iraq, Libya, Egypt, Syria, are examples of countries which didn't respect the petrodollar monopoly. Either they were attacked by military, or the media called them "Axis of Evil" and imposed embargo on them (Venezuela, Russia, etc).
That's how currency becomes powerful by using force.
So, one could empower BitCoin by finding something that is essential for the world to function, and which can be easily controlled, and ask that such a commodity can only be paid in BitCoins. Instantly, demand for BitCoin would skyrocket, and so would its value. Then eventually it would probably stabilize. I hope this scenario will never happen, because it would be yet another racket. And the world already has plenty of that.