In the world of stocks a price decrease of 10% is already a major crash.
In the cryptocurrency world it's just something like a rather bad day. Maybe even recompensated tomorrow.
Corrections can come every time.
A real crash (I'm talking about 70% loss) I doubt that. It would need a trigger for that to happen and don't see something like that.
Not even a possible fork of bitcoin.
I think bitcoin is now down by 20% - that's a substantial chunk of change at these price levels.
You are right that in the alt space, that is nothing, and that would also have been nothing in the early days of bitcoin. But the volatilitu should be dampening down as bitcoin gets bigger, not staying the same.
I can not call it a fall. This is a recession that bitcoin periodically has after a long growth. It was anticipated and many predicted it. Now everything is normal. And after the coin sinks to 3500, it will start to rise again