For bitcoin to be used as a store of value and a medium of exchanging for goods and services, It must be stable like others currencies.
What stability? What "other" currencies? Fiat currencies? Fiat is the worst store of value.
This is the purchasing power of the U.S. Dollar from 1913 to 2013, and it is contantly sinking.

Give me Bitcoin, or give me death.

i believe he was talking about other currencies aka fiat like USD,JPY,CNY and many more.
also, that 'thing' is much more stable compared to Bitcoin if we are looking at its history.
USD lost 96% its power in 2013 from 1913, but it needed 90 years to do that while Bitcoin only need a few months. that means USD is much more 'stable' compared to Bitcoin.
Obviously you have no idea what purchasing power is all about. Purchasing power is the value of a currency in terms of the goods or services that one unit of it can buy, probably that will give you a better enlightenment when considering the progress that bitcoin has made being a deflationary entity to what fiat has been over the years, so in a way, you really have some absurd ignorantly placed comparison. If you are considering the short term fluctuation in value against the dollar, then you are basically missing the point already.