Bitcoin price is based on the forces of demand and supply and when people cannot make their transactions as at when due its only logical to find other means of making the transaction. In the few months back, when a deal is to be struck there is no need for the asking of which currency to use because its by default that bitcoin is the currency of acceptance but today it needs to be agreed whether I am ready to accept bitcoin or not. All this little issues in the long run when put together affects the overall price of bitcoin.