A value that fluctuates every single second (e.g. an exchange rate between Euro and USD for instance)
A value that decreases over time (inflation, etc.)
Do you understand sharing billions among the governments so that every country owes every other country money and vice versa? Because I sure as hell don't.
Do you understand Quantitative Easing? I don't.
Do you understand quite a lot about any currency whatsoever beyond you earn a number, you have that number in your bank, and at some point you "cash out" that number for physical goods that may, or may not, be the same price as last time you did that?
How much is billions of Euros of Greek asset worth at the moment? How about Zimbabwean dollars?
Bitcoin is no different to anything else. Your USD or GBP or Euro means NOTHING except by common agreement between all parties as to what it means.
So don't give me that shit.