> This is the definition of a good store of value.

No, it isn't. Apart from the fact that countless people have lost their shirts to BTC (it's down 6% today! There are losers today!), an asset whose value rises in unchecked proportion to the real economy represents a fundamental liquidity risk: everybody is going to want to sell, but nobody is going to want to buy.

That is why cash is the canonical store of value: not only does it not change (much), but you can exchange it without undermining the value itself.