It’s also a store of value across space, since I don’t have to physically store it or transport it (or pay for its storage or transport). Its value exists as long as I have access to my wallet and my pass phrase, and it maintains its value year after year.
Even at a near 50% drop since its high, it still worth 10% more than it was a year ago, and 400% more than it was worth 2 years ago.
“Bitcoin is a store of value because it stores value across time.”
Is that something you heard & repeated or just made up? In either case, read it back to yourself a few times and see if it makes sense to you.