I wonder if "Pride goeth before destruction" is an example of two types of biased perception.
First, I suspect a visibility bias -- prideful people make themselves more visible and that makes their falls more noticeable. Would anyone notice if the invisible "millionaire next door" blew up their account on a bad futures play? Thus our data on the correlation between pride and destruction is skewed.
Second, I suspect a causal bias -- prideful people are more likely to attempt ambitious risky endeavours to feed their pride. Thus prideful people are more likely to attain the great heights that make their fall so notable. Could we not say "Lack of pride forgoeth construction" to go with "Pride goeth before destruction"??
Hmmm.... so does pride really increase the probability of the destruction of a successful trader?
Maybe the real issue is a distinction between two types of pride: an ambitious forward-looking pride that does what needs to be done to achieve success vs. an self-congratulatory backward-looking pride that presumes that the world will bend to that prideful, egotistical person. Ambitious pride is good in a trader since it will drive them to continually change, adapt, and improve their trading. Self-congratulatory pride is disastrous when the cold cruel calculus of the market refuses to bend for the egotistical trader.
Like all adages, "Pride goeth before destruction" holds a dangerous falsehood and an interesting truth.
Wishing all ambition without hubris,
Traden4Alpha