I think Bitcoin can not be attacked because Blockchain technology is now growing and no one knows how Bitcoin was created. Only exchanges are attacked and this really does not affect Bitcoin
Good thinking and I agree a bit with your opinion.
I think about the bitcoin hack bit believing because there is news spread if the hacker is there there is even someone who says "if anyone can stop hackers then I will give the fund of 150 dollars as a guarantee" means there is news circulating and also us as bitcoin users should be more careful again.