Bitcoin will never fail because it's main purpose is just an alternative currency, a decentralized one.
The failure is on the part of the human, either we fail to invest,(we loss) or we failed to adopt on bitcoin, because bitcoin will continue to exist regardless of its price and the number of people using it, which we would never know, and as long as there are miners, bitcoin will live.
That's what my take on this. And considering its price in the market today, I don't think Satoshi envisioned this price level when he was creating it. The price 10 years ago was way way below than what we have now. I believe the goal of Satoshi has been surpassed already, if he can only make a statement on this regard.