The "shared goal" is burning electricity for no good reason. Bitcoin did the same calculations with 10 WHr that it does with 100 TWHr.
The true cost of energy was already known before Bitcoin. It's the amount of money people are willing to exchange for some unit of electricity. All Bitcoin did was raise this known cost a little higher for computing redundant calculations.
The energy that you put into Bitcoin can never be gained back. It's a consumer of electricity, not a store.
Star Treks economy was a utopian communist system. How is a hypercapitalist system ever going to approach that?
Finally, this whole question is not a scientific question in the first place. It is a mathematical one.
Mathematically, is the cash flow within bitcoin the same as a ponzi scheme? The answer is yes, since there is no source of net revenue and older investors are paid off using newer investors money