I think there are two types of comparison that allow us to say that bitcoin and gold are salvageable:
The monetary vision: gold was a currency in a certain era, and bitcoin is a currency too (1st common point), except that gold is a matterous currency so we say that gold is a currency that has its value in itself.
How to have gold and bitcoin: the operation by which one builds bitcoin is called mining (as the case of gold) this operation requires 3 factor: big machines- time- and Workforce . it is very close to the mining of gold too which requires the same factors.