We could say digital gold is btc alternatives. But bitcoin has no physical asset and consist only of digital but has immensely got some fair value. If you would noticed both are limited in supply like btc max supply only to 21million while gold is a naturally occuring mineral which also can be conserved as thr process of producing is limited to countries potential resources. If this in the future got depleted more, imagine its price value due to scarce. The only difference of two are its use case which gold preserve more advantages since it can backed up some currency such as US unlike btc which still got some issues.
One of the fastest-growing markets today is with the use of cryptocurrency and one of the most popular is the bitcoin. Now it gives a huge market income to the community why it gains a lot of income. Many people make an investment in it today because they see the potential of this coin to have a good profit when the price goes up. We have two sources today which is the fiat currency or the physical money and the gold both of the prices of those are profitable but today the bitcoin shows and facing the gold today. There are some people stating that the bitcoin can be substitute with the gold but I think it is better if we use the bitcoin or cryptocurrency as a third source even the price of it is volatile because of the trading and transaction with the use of it all around the world.