Price is important, could be good for price to stabilize but it is not critical.
Price matters because according to the price only we will get our earnings or profits. If there is no variation or growth the attachment towards bitcoin gets deviated over other crypt currencies in the market
If the price is stable or rising, then adoption increases. People get more Trust in bitcoin and start using it. More miners start mining, and if price falling down then people loose their trust on Bit coin. If price increase then we earn more profit on Bitcoin