vickers it boils down to risk and reward.
If you buy now and the stock has a 10 pop you will get a good reward for your risk.
If you buy the stock at $5.00 there is less risk and less reward so if the stock still goes to $16.00, you make money, but not as much if you had bought at $1.60.
I tell my more conservative kids that if you believe in the American economy over the future years, you buy the index funds.
If you believe in the TPMs, interoperability and Wave, you buy the only sure play at the moment in this space: Wave Systems.