> Currency isn't SUPPOSED to be this volatile. Currency is NOT supposed to be an investment mechanism in and of itself.
Agreed.
> If I buy a loaf of bread for $1 now, I should be able to buy a loaf of bread for $1, 10 years from now.
Don't agree.
> Currency inflation is BAD, and so is currency deflation.
Don't agree.
> Stability is GOOD.
Agree. But stability doesn't mean the value of currency doesn't change, it only means the value is predictable. A currencies value need only be predictable, not stable.
Stable value of a currency is impossible, you cannot keep the loaf of break the same price over a decade and you certainly can't even attempt to do it without the power to inflate or deflate the currency.
The things you want from a currency, i.e. unchanging value without inflation or deflation is simply not possible. Wealth isn't fixed in supply, it fluctuates drastically over time and thus so much the supply of money if you want to attempt to keep the value stable and that's why we inflate the value of our money ever so slightly each year, to maintain predictable value over long periods of time while avoiding the negative feedback cycle inherent to deflating it.
We had a currency that relatively stable in supply, gold, it made a horrible currency because as wealth fluctuated in supply, and there was no ability to manage the supply of gold, the only natural thing that could happen did, the value of the gold supply fluctuated wildly, exactly what you see happening in bitcoin. If you want stable value from a currency, you need the ability to inflate and deflate it to maintain parity with the fluctuating supply of wealth in the world.