Value is subjective to the individual but objective to mankind.. I can say I dont value water because I am not thirsty, I can never say that mankind doesnt value water.
Further the measure of the subjective nature of value is called price!!!!
And price is measured by currency. And Bitcoin is currency. So what's the problem?
You can't have an objective measure of value that is disconnected from price. It's just not possible. Gold is a joke. Fiat currencies are inherently flawed. The "accounting" profession is a total fraud. What else is there? Nothing. That's why we have Bitcoin.
Like I said, in fifty years, price and value will likely converge in Bitcoin anyways. If you can come up with an "objective" measure of value between now and then, more power to you. Odds are you won't. It's a hard problem. So just accept that Bitcoin is a currency in the short term, and (hopefully) an objective measure of value in the long term.
You will never get me to believe that you can have a system of measurement without a UNIT of measurement. You can believe a lie if you like. The whole world has been believing a lie for the last 40+ years, but that is coming to an end. Reality is the ultimate regulator. People can go a long time ignoring reality like when we believed the world was flat, but reality always wins out in the end.