Well, I had other things as well (e.g., telcos, which did pretty well). It's just that when I started RIMM was on top of the world: this before the iPhone was released. Over the course of some time (I don't remember the exact dates/years anymore), AAPL went up and RIMM went down.
Which goes to show that being on top is no guarantee of anything. Just ask ExxonMobil (XOM): in 2013, a scant seven years ago, it was the largest company in the world (surpassing Apple).
When I started investing, being an EE and working in IT, I tried this: I bough AAPL and RIMM. One did better than the other.
I'm now basically all-index all the time.