Thirteen said:
if any of these dudes could trade, why would they want to make their living teaching?
(i) For a change;
(ii) To combat loneliness;
(iii) Because they're good at it;
(iv) Because they enjoy it;
(v) Because they get talked into holding courses by marketing companies who want to take a huge cut of the fees generated;
(vi) To develop and build up a teaching business which, unlike their trading activites, can be sold on to someone else as a running business;
(vii) To ensure they have some official earned income to declare, on which they pay income tax, thus ensuring that the Revenue will never be able to tax them on spread-betting profits;
(viii) To raise money for their favourite charity;
(ix) For the same sort of "self-esteem" reasons that make people labour over excellent books which will never show any realistic financial profits;
(x) Because it can be better paid than trading (if you can get 60 people together for a £2,500 one-day course).
I'm sure there are many other possible reasons, as well - perhaps even nearly as many as there are teachers. But some of those were among my reasons, about 10 years ago, for teaching something I could have been "doing exclusively" instead of just "doing mostly" and teaching occasionally.
For the record (and I suspect like several others at this site), I wouldn't be trading at all if it hadn't been for a course getting me started.