Buy an index fund, not individual stocks. All companies don’t go to zero at the same time.
They will all go to zero, given a sufficiently broad timeline. They're making a joke.
I don’t think the investors on the Shanghai stock exchange on 1939 would agree. Nor would anyone invested in any company between Germany and the Soviet Union at that time.
Dividends mean investments can have positive returns even if the companies value goes to zero.
Exactly. In fact, the best way to determine a fair value for an investment is to estimate the net present value of future cash flows to owners: from dividends or a terminal acquisition.