Hackers will always be social engineers at the first place, not magicians, and will exploit human stupidity.
Bitcoin is sensitive only on bad karma. Not on brute force! Bitcoin as idea is ideal of freedom, and if they cannot take your
freedom, they will lie about it in worst ways.
Bitcoin is limited to the stupidity of its users. The wallets themselves are extremely hard to gain access to unless they are online wallets. If you use a software or hardware wallets, it is much harder for anyone to hack into them. Some people are naive and get easily fooled by people who try and steal their money. You just need to be smart about what you do and don't allow anyone to access your money.
Above mate described about the secure nature of bitcoin and the storage wallets. Bitcoin is getting much stronger when years were getting passed. On thing to describe its strength is that several banks and corporates planning to implement the bitcoin technology into their business. If something seems to be a failure none gives a try, here due to its success getting acceptance more and more.