The dangers of money printing are many in his eyes. But in particular, he worries about the unintended consequences it subjects the populace to. Beyond currency devaluation, it creates malinvestment that leads to asset bubbles that wreak havoc when they burst. And even more nefarious, money printing disproportionately punishes the lower classes, resulting in volatile social and political tensions.
It's no surprise then that he's feeling particularly defensive these days. While he generally advises those looking to protect their purchasing power to invest capital in precious metals and the equity markets (the rationale being inflation should hurt equity prices less than bond prices), he warns that equities appear overbought at this time.