It is a bubble for sure, propped by stimulus monies (taxpayer monies), companies cost cutting (read: firing people) and weak dollar (increases revenues from abroad). All of them are not sustainable
look, bubbles happen on capitalism. HOWEVER, A BUBBLE CREATED BY THE FED WITH OUR MONEY is really, really stupid. The thing "feels good" for many Americans that have portfolio, but when this bursts (and it is going to burst), we will be worse off than when we started.
It is still time to control this bubble, by propping the dollar up, sucking liquidity out of the system, and maybe rise(s) interest rates. let's see in the near future how responsible our fed is