It will be very difficult for us, who use btc, because we will lose our money. Also we will return, to time which believe anything they say in the newspapers and tv. We won't the opportunity to communicate and our economy will have bad results. Also many people are working only online, so they will lose their jobs too. In the end, only bad things will happen 
the hard thing that maybe we should have is we can not communicate with other people in other city or other country, many of communication and economic will disable and we are back in stone ages. i can not imagine if this is happen because we live in this year with so many easier thing that allow us to make relationship with other people.