Quote from EricP:
Regarding thrifty: I see this over an over among successful traders, but don't have a great explanation on why.
I think in part it may be correlated with a self made person, just like one who starts their own business whether it be a restaurant, plumbing company, retail store, etc. Early on you work your tail off just to survive, knowing the failure rate is high in start-ups. The frugal or thrifty mentality may become a part of who you are over time. Some simply continue along with this mindset regarding money and are cautious with their spending. And I recall years ago when I read The Millionaire Next Door that the authors pointed out that many self made millionaires are exactly like this -- frugal/thrifty. And living below their means is in part what allowed them to become millionaires and financially independent.