I believe that bitcoin is underestimated, I do not claim that it should only grow! But I'm sure that the future is for him! crypto currency in general, and bitcoin in particular - this is digital gold, many people still do not understand this. I'm sure that in ten years it will be so.
In which sense? It's unclear what you mean exactly. In terms of value? It's already past. In terms of use? It's an entirely different thing. In terms of how it's transacted? Again, entirely different. The only comparison you can realistically draw is the use as a hedge. Bitcoin is increasingly becoming more useful for people who want to protect themselves from political instability, trade war, currency devaluation, populism... you name it.
I agree with what Katherin is saying here that in terms of value, as in value in USD, which is the benchmark most people care about. Whether the comparison is actually apples to apples or apples to oranges, is not irrelevant to most people. When I talk Bitcoin to someone who I know isn't an enthusiast, but also not a hater, one of the first things I say them to get their attention and give validity to our digital friend, is this, "Did you know that Bitcoin is worth more than two or three times than a troy ounce of Gold??", to which they usually reply, "oh shit, you're right", and then I proceed to explain to them about how that fact alone should, and does, give BTC instant credibility, relevance and comparibility to anything that we give a USD value to. Of course, I'm considering all other things as equal. So the fact that BTC HAS surpassed the value of one troy ounce of Gold many times over, should answer your question OP. But, somehow, I think you still are going to be comparing apples to walnuts because if you would have done a little google searching for the value in whatever fiat currency you want to compare the value of XAU to BTC with, you'd have your answer and not ask such obviously apparent questions here. But then again, this is very subjective subject matter
Yeah actually it is a good basis for comparison for those who have no idea what bitcoin is, or even is worth. It can be said to be a digital payment system that retains value more than gold and is therefore much more trustworthy and secure. Also it allows anonymous online transactions, etc. etc.
When you examine the particulars, they are nothing like each other, but people need some form of anchor when being introduced to something new. So the gold-bitcoin metaphor can be helpful if the person has never heard of bitcoin before just give them a basic idea.