I heard another story: i heard that `enemy` did it to ruin our financial system.
Even in LENIN’ times it was openly discussed in communist russia as a method to gain world domination: attack on western finance system.
whoever that may be: kremlin, beijing or `islamists`: i think only russians have knowledge and expertise in this, and lots of russians work in finances in US, tens of thousands if not more: just go downtown new york and walk the street : you will hear them talking.
I used to work as a head hunter for IT industry in the 90s. We placed dozens of russians and we were a very small agency. I know that many very high profile hedge funds are crawling with russians.
I know a financial organization that made their money through the unexpected death of a large investor from moscow who gave them 20 or 40 mil
Well it may be far fetched but it depends on how you look at it and what you know.
From what i know - they planned it, they have capability to facilitate it, they wanted to do it.