In the eyes of economists, it is difficult to assess the value of Bitcoin. With the existing economic model evaluation, there is no reference, bitcoin can not see intangible and there is no statutory credit support, unlike gold can be considered from industrial use, jewelry, central bank reserves and so on.
Bitcoin is open source. Anybody who spends 2,000 yuan can copy the same bitcoin system. A full name can be sent by changing the name of a street currency. What is their value?
I don't think that we can put a stable and true price for bitcoin because it is the market and the people that puts a value and price for it. If you wanted to put a value on your bitcoin then I think you can do a cost averaging based on how much you have purchased on a certain date. This is the strategy that I do and follow on putting a value on my bitcoins.