Janet Yellen recently expressed concern regarding the amount of debt in the economy. Apparently giving out loans at rates less than inflation causes a lot of malinvestment.
Those I know investing in Bitcoin do so because it's the only asset that exists outside the system we have today. It's the escape hatch. The volatility of course concerns us, but we believe in the fundamental ideology and in the long term believe it'll change the world. The monetary policy we have today is, quite frankly, insane.