It's not a store of value by these metrics. If your primary concern is being able to store assets that cannot be seized or frozen by, say, foreign adversaries, it suddenly becomes much more viable. Occasionally up or down 50% is a lot better than down a guaranteed 100%.
Ironically then foreign adversaries target and hack you via wallet backdoors and such. And because it's such an "unseizable" currency, you don't get it back:)
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.