So you are hoping for the creation of an independant state because of Bitcoin on an island. This is impossible for the sole reason that no state will leave sovereignty over a piece of its land, so except if your plan is to buy a whole country that will not be feasable.
Actually you are getting wrong when it is become a legalize it will strong your economy even more than before. Suppose it is legalize by any state than that state will give an acceptance later to bank to accept the bitcoin investment into banks. So it will keep protected in your banks. And the risk will be also reduced.