And yet, reality disagrees with your logic and stablecoins are on track to be used even more.
Tokenization on Ethereum will end up being way more important and useful than pet rock Bitcoin.
On a related note, blockchains often obscure the true consensus mechanism behind layers of complex jargon. Upon closer inspection, consensus is still built on trusted parties, just not the same ones typically found in the traditional economy. In Bitcoin, for example, you not only have the relatively few powerful miners but also the Bitcoin Core developers, who wield significant influence over which changes are incorporated into the Bitcoin node. For example, enabling the OP_CAT opcode again [1][2].
[1] https://www.reddit.com/r/CryptoTechnology/comments/19bik6z/u...
[2] https://www.reddit.com/r/Bitcoin/comments/19adyi0/should_op_...
This has hardly been proven. Gold has been recognized as source of value across several millennia and multiple cultures. I would bet that 1000 years from now gold will still have value, whereas stocks are only valuable in as much as the rights that they represent can be enforced by a court and implicitly the state backing it.