Bitcoin is not digital gold. Digital gold is more like traffic. So the comparison will be appropriate. Gold is a resource that is so popular that everyone knows about it, so in the digital world this function will be represented by human traffic. Of course, it can be monetized, and therefore it is a digital asset.
Bitcoin has everything to be digital gold tho... I don't think only the popularity is to be considered to make that comparison invalid. Actually I think that the only thing BTC lacks against gold is popularity (and track record ofc).