Please explain me this
Imagine I invested 1 million in s&p500, i collect 1.35% dividends and right after the price falls by 50%, so I'm worth 500k. How much dividends I get in $ ?
It depends on lots of factors. Usually the decrease in dividend percentage is delayed after a crash, by a few months. So, at first you'd probably get ~3% of $500k in dividends, and then you'd get 1.35% of $500k, once companies in the SP500 get affected by the crisis in question and reduce/eliminate dividends.
At least that's what happened during the last two crashes (2009 and 2020).
It's hard to predict the future in this sense though, because we don't know what will cause the next crash or how bad it will be.
As they say, "hope for the best, but prepare for the worst."