Sorry Mr Buffet but i think you're an idiot!
Not every investment need to pay himself back.
When you believe that the demand for a product increases in the future, than you buy as much as possible of that product (like you did yourself with buying coca cola stocks etc.) .
You know that higher demand also means a higher price.
With his own logic reasoning above, it seems to be the absolute truth, but in the ' real ' world it's a diffrent story. According to his reasoning, investors in, for example, oil, gold or ' real ' currency are thus no investors!
After all, these investments pay no gain or rent to her owner.
Funnily enough, virtually every investment bank has a whole division that's specialized in this type of investments.
For bitcoin is the same: we believe that our financial system needs to be replaced and that bitcoin's the solution.
When this transition takes place, the demand for bitcoin will rise.
By the scarcity of the bitcoin, eventually also the price will rise.