I don't think people should be considering bitcoin as a gold in "digital world". This will just encourage people to use bitcoin as a store of value that will appreciate overtime. If this happens, we will never be seeing bitcoin used as a regular mainstream currency.
I do agree that bitcoin should be seen as a thing to use as well as storing it as well. However, I do not think that gold payments are 100% gone all over the world and even if it is, it was not like that back in the day. It means that there was a period where people both used gold to store their wealth, but also used it to buy things as well. Do not think about now, to make it easier think about 2000 years ago, very wealthy people had a lot of gold stored somewhere but they also spent gold to buy stuff as well, Crassus was literally buying whole neighborhoods with gold when it was burning.
Long story short, bitcoin could be digital gold, just not the way gold is used right now, it is the gold that was used 2000 years ago, it is both spent for buying/selling stuff, but if you have excess amount of it, then you store it as well. Not every dollar is used neither, most of it is stored somewhere, same logic here.