Probably a couple months by reading a few key books and following up to understand the specifics.

And no, I went with an index investment strategy, not trying to beat the market. But it really helps to understand why index investing is a good choice.

I wonder what to read to understand how the fact that so much money is invested in index funds these days could eventually become a problem in a crisis situation and how to profit if that happens.

At which point you short said index funds and laugh as trillions are wiped off these etfs and index funds in the blink of an eye...weeee