I think that's the wrong way to look at it. IMHO a better is that bitcoin is a bank account or savings account where things get cheaper and cheaper. This seems to me, to be better than the alternatives, right now.
Discussion
I can't see any magic that would make one's coffee just get cheaper and cheaper. It's not like agriculture is somehow subservient here.
Coffee is denominated in the weaker currency. If you hold the stronger currency, what you purchase is cheaper *at the time of spending*.
I can see some 'cashing out' of accumulated store-of-value margin. But once you start connecting the store of value to the supermarket then it becomes entangled with everything in the supermarket and beyond. It would be the same with gold.
I still can't really see any real difference between bitcoin and gold. I've read that around the year 2140 all bitcoin will have been mined. I've seen estimates for gold that by the year 2100 all gold will have been mined too. The percentage of bitcoin actually being used in commerce is minuscule, same with gold. Governments seem to want both for reserves. Calling bitcoin digital gold seems about right to me.