This scenario came up on your mind is so hard to come knowing how far already reach by bitcoin and even if there's massive dumping situation will happen still it will not come to the point that bitcoin will go to zero since on whatever situation it may go thru there are still people will buy this.

But since you are thinking that and want to ask people here for sure it can affect them so bad especially if they are heavily invested their time,effort and money on bitcoin for sure majority of us will be so sad if this case will really happen since we don't have any chance to earn back thru bitcoin since for reaching zero in value for sure this is totally dead and can't able to recover back. But its really so far to happen so newbies thinking about this to happen should not get worried since bitcoin is already a strong crypto and it cannot be dump as easy as that.