The real value of Bitcoin and other cryptocurrencies can only be determined at a certain point. In the next instant, their value will be different. Since there can be no fixed price in a decentralized cryptocurrency, it is impossible to determine their value for at least one day. During this day, their price will change many times. This is one of the main features of the cryptocurrency market.
I agree that now that we still have enough supply that is going round in the market which is the cause of prices changing many times, it will be difficult for bitcoin value to be known as the supply available can still be enough to manipulate the market value anyhow, but what happens when there is no longer supply available for people to purchase?
I think the price of bitcoin will become static then and that will be the only way the real value will shoe, although my friends has told me several times that the real value of bitcoin is known on an exchange through its volume which I still dont understand, because most value that I see on exchange corresponds with CMC value.