This is not deep. This is you getting confused about how money works. Nothing you are realizing applies specially to specific money like gold or Bitcoin - it applies to all money and frankly it makes little sense.
I understand cash has this same issue. Assets do not - they provide an actual value to the physical world - which is what my point was in the above statement. A crypto t shirt can still provide value as a t shirt, regardless of the value of the coins it holds. I’ll admit it’s a reach, but just to illustrate the point.
What gives money its value? Well it depends on the money. Fraud, violence, trust, in the case of Bitcoin: cryptography and game theory.