Now you'll find that the essence of currency is still consensus, and its value is given by consensus as well. The collective consensus will gradually render Bitcoin a world currency. No one can resist this trend but adapt to it.
The value of BTC, like gold, is determined on how many people are willing to purchase it at a given price. So basically, the law of supply and demand primarily determines it price on the market. With all the investment opportunities that most people see, they fail to understand that the true value of BTC is the technology that powers it- which is the blockchain technology.
With this in mind, by applying such technology to our transactions, this has the potential to convert our modern currency into a digitalized one due to a ledger that exposes all public transactions.