It is worthy to note that Bitcoin operates on a decentralized network, This means no central authority or government controls it, Bitcoin gives full financial security and you have privacy you alone controls your money, when you invest in Bitcoin you won't have to worry about government policy, in the time of war or conflict your investment is secured.
You are correct that Bitcoin gives it's owners the privilege of controlling it without third party influence. It is also worthy to acknowledge that keeping Bitcoin puts an enormous responsibility on you. Any slight mistake can make you lose your Bitcoin. That's why some people who can not take such responsibility prefer to use third parties.
Bitcoin is indeed a good investment platform, but it will not also be out of place to diversify your investment. Real estate is a good asset to invest in. All investment has some level of risk, there is no need to discredit anyone.
Government policies could affect Bitcoin, an example is high tax, exchange restrictions or outright ban. You might have to move out such country to have a stress-free Bitcoin transactions.
In times of war, Bitcoin is a very good assets, since you can easily move to another location with it. But during war, the main focus is on survival.