Can BITCOIN fall back to $0 ?

I write very crisp. 

I do not drag something for long which can be said in a line or two. 

Believe me or not sooner or later Bitcoin is going to plummet at the level at which it worth nothing, and I am saying so because --

>> Governments and central banks are going to launch their on digital currency as an alternative to the bitcoin. 

>> Reason everyone will migrate is plain - People want security of their money. It hasn't proved yet that blockchain cannot be hacked. 

>> Dramatic fall of Ethereum as we have witnessed in last could happen with any cryptocurrency. 

Thanks 

Please Criticise constructively.