I have expressed this argument at length before but will repeat again much more directly.
Money, stocks, bonds, loans, BTC.. basically all non-hard assets are massive fantasies.
It's not my argument but of a renowned philosopher John Searle. And no, he is not some French postmodernist, he is as realist and naturalist as you could get as a philosopher. But basically, all these assets are forms of institutional reality that is created via a series of speech acts (nowadays "document acts").
You may argue... but some of these assets are "backed" by something else. My stock certificates represent ownership of the factory, the money is backed by the government, etc. Well how do you establish such backing? Document acts... but there is nothing tangible and physical about this backing.
How do we know? Suppose a dictator comes along and instructs all financial records to be wiped out. All of the assets above will be worthless. So really, investing in such assets all require some level of faith.
Now, the chance of US currency or treasury bills facing such events will be very low... at least compared to BTC. So you can estimate your confidence. Maybe I have 99% confidence in traditional assets and 1% confidence in BTC (relatively). So I decide to invest 99% in traditional assets and 1% in BTC. But then I realize the asymptomatic nature of that 1% in terms of the return. If BTC establishes itself as a stable store of value, my gain will be significant so I decided to invest a bit more.
(As an aside... I have a feeling that many economists and those with the traditional business school mindset have a harder time grasping this "massive fantasy" notion... I think it's largely because they'd like to think of their discpline as scientific and objective... they want to treat things like money, yields, institutions as the same ontological category as molecules, chemical elements, and gravity... I'm sorry they are not. In a way, I think they are resentful of the fact that they are not scientists, engineers, nor doctors dealing with objective reality... and perhaps their discipline is not as important... so they need some ground to stand on and argue that traditional assets are backed by institutions as if planet motions are governed by gravitational forces.)