Except this hasn't been the case for well over a decade in the U.S., and for several decades in Japan. The money doesn't trickle down, it just sits in reserve because nobody wants to invest it in capital goods, labor, etc.
And monetary policy doesn't even seem to be the primary culprit of asset inflation. Profits sit in reserve, too, and the past 15+ years of global profits have been enormous.
Say what you will about Elon Musk's financial profligacy, but the man plows money into capital goods and labor. And the fact that he's plowing other people's money is what makes it so laudable. We need more salesmen like him who can convince investors to actually invest.