I believe that unmanaged (fire-and-forget type) store of value is a fiction to begin with. Most if not all thing depreciate in time for wear and tear or plain obsolence. Managed assets such as a business you're controlling or your own set of talents and skills can appreciate over time. Scarce assets such as gold or real estate appreciate, however not due to their inherent value, but only due to the "greater fool" dynamic; it's unstable, and unpredictably so.

So what we have is governemnt creating an illusion of unmanaged store of value through financial engineering. It's is somewhat artificial, so I suspect it's not stable either. Consider that financial bubbles are caused by excess of capital relative to production needs, and the glut of capital was accumulated strictly due to people trying to preserve value of their savings. There is a mismatch between amount of value people are trying to preserve and cumulative size of viable investment opportunities.