I really enjoyed this piece, and it is probably more interesting than the comments (you know who you are). The quote at the end is a great take-away. How do you

I really enjoyed this piece, and it is probably more interesting than the comments (you know who you are). The quote at the end is a great take-away. How do you know you are good at trading or just got lucky? How long will it take to work that out? And is it worth the energy?