get a room. we'll never see single digits again. In the big picture Bitcoin is still a baby and its just going to keep climbing as more people jump aboard/adopt. Also the increasing rate of BTC that get tied up in limbo is making Bitcoins even more scarce adding to this massive deflation that will continue until we reach the >$1000s/BTC.
Barring hiccoughs along the way and major-fail situations, of course.
The bullish way to think is that, as you say, demand is vastly outstripping the minting of fresh 'coin. Thus the price can only go up. If serious (hedge-fund, billionaires') money flows in, price must go up some moooooar, big time.
But asks can appear on the exchanges out of nowhere, like bears creeping out of dark forest. It takes a lot of demand and a serious scarcity of 'coin on the market to keep the price rising up there. A small holder like myself is not tempted to open my cold wallet and unload the precious few BTC it contained for a measly $90 each, probably not even $900. But in the $300-$500 range, say, it is quite possible that some hitherto unseen hoards will come out into the open, and the ask/bid balance will tilt, possibly starting a bear market. By no means does that imply dropping back to $10 or anything crazy, but maybe, say, a rise to $400 then a quiet "pop!" of the "bubble" and a gradual descent back to about $150-$200 before the rocket refuels for the next launch.
If only we knew exactly where these peaks and troughs would be, we could get rich baby! 
