Usage or the utility of Bitcoin is what gives rise to the demand and accumulation of Bitcoin. The demand increase means that many people are buying and utilizing it which in return acts as the price propeller, without continuous demand and usage the price will likely not be as volatile as it can be most of the time especially during bear and bull season when there is either more buyers or more sellers. The demand or usage of Bitcoin is what drives the price to increase and the increase of price is very necessary, either ways, both usage and price increase is very important.