You can make billions overnight if you think it is inevitable.
As many have commented, not really. Shorting is about exact timing as much as knowing the inevitable outcome. Get the timing just a bit wrong and you can be right and broke. The Big Short portrays that quite well.
How? I would like to! And don't say shorting because, well inevitable doesn't mean imminent.
“Markets can remain irrational longer than you can remain solvent."
As many have commented, not really. Shorting is about exact timing as much as knowing the inevitable outcome. Get the timing just a bit wrong and you can be right and broke. The Big Short portrays that quite well.