You're redefining store of value to make it fit. You aren't storing value with bitcoin, you're converting value of fiat into bitcoin at a specific point in time and then later able to pull out some other value of fiat.
Its almost a given that the value you pull out won't be what you put in, likely not close, its either much higher or much lower and that changes frequently over time.
Its almost a given that the value you pull out won't be what you put in, likely not close, its either much higher or much lower and that changes frequently over time.