I think the only reason why some people call Bitcoin, digital Gold... is because it was designed to act as a store of value, not because it is actually a store of value. (timing will more or less determine, if it was a store of value for the seller)
Yes, it is virtually mined like Gold and the software emulate scarcity with the Block reward that are halved... but it does not guarantee a constant increase in the value.... as we saw with loads of previous dumps that crashed the price.
You have a point but from my own understanding, I believe Bitcoin was called digital gold due to how it introduced new opportunities to everyone no matter their class, and it also changed people's understanding of fiat currency while also impacting a lot of people's life I am talking about people who never knew they will be a millionaire as we speak.