bitcoin is not so strong enough in case of security and it can be hacked as it happen during the bitfinex attack. well the bitcoin is so strong that it can run without any government people and it can totally by itself for the world to keep going.
it is not about bitcoin, it is because bitfinex security system is not good enough and hackers attacked and change all the address. Dont blame Bitcoin, it is very good right now. If you do not like Bitcoin, you can change to another type of currency
Yes you are right. The very blockchain system is very well protected. And I think this is one of the safest ways to store your assets