Even though I don't think that bitcoin will reach down to $100 again, if it eventually does, more people would have adapted to bitcoin and are able to buy.
For some people the price to buy bitcoin is just not affordable at this time. It would be nice if people who have just started with bitcoin, for them to have a chance to buy some as well.
it will never happen and if anybody is waiting for it to happen they will just miss out on many good things and they will regret it soon as the price goes up and reaches the moon.
the drop of that size will never happen because a lot of us are waiting to buy even when the price goes down $1 let alone anything bigger than that.
I don't think anyone will prefer to buy if price falls back to $1 and if it goes that low then it will be surely an end of bitcoin and there would be no point in buying them at that stage.