The growth of the value of Bitcoin against fiat currency or official currency issued by a country can be said to be fantastic, even the current value of Bitcoin beats the price of Gold per ounce.
Bitcoin is not very suitable to be used as a means of exchange of payment or money, because the change in value on increase and decrease has a big difference. Value Stability - one of the absolute conditions that money must have as a medium of exchange is not owned by Bitcoin. In addition, the increase in transaction file size and also the increase in the value of Bitcoin is equal to the increase or increase in the transfer fee. We can no longer expect cheap and cheaper transfer fees, because with the increase in Bitcoin's price equals the increase in fees for confirmation.