Previous efficiency isn't a warranty of long run return, nor is it indicative of future effectiveness. Investing requires risk. The worth of one's investment will fluctuate and chances are you'll drop revenue.
Also, take into consideration how the fairness impacts your whole financial posture. By way of example, you may want more info to immediately offer shares from RSUs and ESPSs and make use of the proceeds to diversify your portfolio. Or else, your money and a considerable part of your portfolio may rely upon just one firm's achievements.