It actually works well as a store of value because it has a lower inflation rate than every fiat currency on earth and even a lower inflation rate than gold. The little inflation that it does have is only to continue to incentivize miners to keep the transaction fees down and to replace lost coins from private key loss or destruction, etc. Since it is actually used in day-to-day transactions as well, that makes it a lot less volatile than other crypto. And so your store of value doesn't fluctuate by a crap ton quickly.

Is supply auditable?