Interest rates have not been this low since the 1950s. Of course the US economy and financial system were MUCH sounder then they are now. Rates were low then for good reasons -- not because the Fed was trying to keep a massive credit bubble alive.
Liquidity driven and overvalued markets are fun while they last, but people have to be ready to reverse course on a moment's notice. I still expect a huge drop at some point, but who knows how high we go first?
“The things that will destroy us are: politics without principle; pleasure without conscience; wealth without work; knowledge without character; business without morality; science without humanity; and worship without sacrifice.” Mahatma Gandhi