Maybe you're right and in several decades BTC may become so appreciated all over the world that people will consider it national treasure. But now I don't see such tendencies.
bitcoin is not something created from the sky like other natural resources, bitcoin has a creator and even the fluctuations that I see are capable of being manipulated periodically, bitcoin is more feasible than generic stock market assets, there are many problems if there is a state of bitcoin claims as national assets.
The fact that bitcoin was created by man does not make it worse than gold extracted from the depths of the earth. I would even say that on the contrary) Gold has value for people only because we ourselves give it this value. In terms of energy spent, the production of bitcoin is ten times more economical than gold mining)