Bitcoin has accomplished a lot over the last few years and deserves a lot of credit for it but has not achieved its goal yet. Bitcoin is set to achieve global protection whereby everyone will accept its use in terms of payment methods and apply it to their business and transactions.
I think the purpose of why BTC was created was for financial freedom over our transactions. As long as there are countries who oppose to this kind of view, I doubt that we can say that it already has achieved its goal.
Another thing, like what some had mentioned, there is no actual 'pre-defined goal' for BTC. A goal and a purpose is relatively different and it will continue to achieve its goal for as long as countries adhere to its legality. But to give some credit, I do think that we already experienced its effects on our transactions- mostly it is overwhelmingly positive!