If there is some important CEO saying that bitcoin is a scam or worth nothing it may fall, but will always get up, that's the beauty
what you are missing is that FUD only works if it is said on a correct time and combined with some market manipulation.
for example even if all the CEOs in the world say bitcoin is shit today, nothing will happen because we are on the recovery and price is rising with a good buy support that is hungry for even a $20 discount to buy in.