Hi there!
Theoretically, the price of gold and all digital currencies depends on the value of various national currencies. But in practice, the main basis for valuation is the US dollar. The price of gold and Crypto-currency, expressed in a certain paper currency, depends on the strength (value) of this currency. Therefore, many experts consider gold and crypto-currencies as two parallel instruments, into which one can either invest or trade them. What do you think about that? Btw I've found interesting project on investment in gold. I have already heard about it.
This is american project and it actively develops. Have you already faced similar projects? https://solomon.gold/news/income-creation-methods-by-solomon-mines