>>510387415 (OP)
oil is the main reason why our population shot up so quickly. when oil becomes too expensive to use (and stays expensive), the population will likely start going down. i don't think you can short this in our lifetime.
>>510387415 (OP)
The knee jerk brainlet take would be real estate, but realistically you'd get an overabundance of loads of shit including Fiat, shitcoins and even gold.
I guess stock up on complex machine parts that would still be in demand post-collapse.