If Bitcoin is a ponzi scheme then all stocks are ponzi schemes. I would be a billionaire several times over if I knew to invest in Apple, Google, Netflix, Amazo

If Bitcoin is a ponzi scheme then all stocks are ponzi schemes. I would be a billionaire several times over if I knew to invest in Apple, Google, Netflix, Amazon, Microsoft, Dropbox, etc at the right time. At one point, it was common to be skeptical of these companies, and many of their peers did not make it. Who was to say at the time, that exactly these would? You bought Bitcoin in 2011 if you believed it was a sound technology, that would inevitably get popular, and you still buy Bitcoin today if this is your conviction. It might not pan out, as there might be a severe flaw in the protocol, or something better might come along, so don't invest anything you can't watch burn. But if Bitcoin fulfills its promise, then there is still significant growth to be seen.