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
That's completely correct, exchange sites are more prone to hacking because it is where a lot of money are stored, and because of that people lose their money not because of their negligence but because of a certain site. I hope that will serve as a learning experience for those who lose their money not to trust their money in one site only although it's a popular exchange sites.