... My reason for such concentration would be a limited circle of competence, as well as the desire to reduce my finance related reading, in order to make straight A's in school.
DooDiligence,
Somehow, I get concerned reading this, Sailor. Naturally, you can do both! Where there is will, there is a way.
I'm doing both, but between studying & practicing, I have very little time to socialize.
Driving time to & from school is 1 hour & 20 minutes (if I had a chauffeur, I could knock out some practice time.)
If I was highly concentrated in BRK, I'd have time to get my ashes hauled.
As it is now, I choose to read & make annoying posts on COBF & Twitter, instead.