I'm not kidding. I'm talking about human reliability and mistakes.
People tend to overestimate their ability to maintain control when they are doing work. But there is a term which changes everything: STRESS!
Stressful jobs like Stock trading, are always vulnerable when it comes to human decisions. maybe you remember this Japanese Stock trader who lost 225 Million USD over a typo! Over a typo! you read that right. there was also this again Japanese dude, who made a 22 Billion GBP mistake!
And look what I have found:

Do you see that shaddow candle marked? that means you could buy BTC in that moment, for a price muck lower than the market price... from someone who probably had done his/her biggest mistake ever!
The cover image source in the resources tab.