I've made two fortunes (with a data wipe in between) via trading to date. It seemed like a long hard slog at the time, but in retrospect it was the most enjoyable part of the game thus far.
Since getting rich the second time, I've been struggling for something to do. I'm very much looking forward to more missions being added, and I really can't wait for the entire galaxy to be made available so we can do some exploring.
I'm almost looking forward to the next data wipe, and hell yes...make profit from trading a little more difficult - go for it FD....trading for cash gave me a steady focus, and goals to strive for.
I can't see me mining as a money making scheme....it does seem like a really boring and repetitive process, although if I'd not played Elite back in 84' I'd probably say the same about trading.
Making money is too quick and easy at the moment. You can make millions in 3 or 4 days....probably quicker if you do 12 hour sessions.