really? it wouldn't be outside the realm of normal. that's roughly the equivalent of the 2011 bubble pop. that would probably be the worst case scenario, but i wouldn't rule it out!
Just because something can happen doesn't mean it will happen. If that's your way of looking at things, we shouldn't discard the possibility of falling back below $100 either, or even below $10.
Back in 2013 we were initially hovering around $15 and within the same year we touched $1100. The long term correction took the price back down to around $150 in 2015. It didn't fall back to its starting point and it won't this time.
If there ever would be a time it was a realistic possibility, it would be after the 2013 correction, but it didn't happen. We're way further now and created a new floor just like how we created a new floor after the 2013 bull run.