Bitcoin is not created by any government or organization so it cannot be an official thing,its like open source for everyone and its has been used as currency on many places.If you talk about the unstable value then you are at risk but when you are holding it,you never going to see failure in the value.So you are at better place when you invest this money into other form of investment.
By investing in Bitcoin you put yourself at a certain risk, but this risk is no higher than investing money in a bank with interest. Bitcoin was and will remain under your control, but the money in the bank is not.