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.
I think everything is the opposite of what you say, investing in bitcoin is more risky than investing in a bank because bitcoin is never under our control when bitcoin always has a very wide range of changes, the risk is not as fixed as we think and often face unexpected situations, so we always put ourselves at risk every day as long as we hold bitcoin. But even knowing these problems, people still prefer to invest in bitcoin because with uncontrollable changes, it can always generate huge profits, banks can't do that, so taking higher risks when participating is what everyone agrees