These corrections will get relatively smaller with time, as more and more people start using bitcoins. That is my prediction.
They have been getting bigger, though.
A couple weeks ago these corrections were 20% drops, and a couple weeks before that they were <15%.
Don't measure as a percentage, measure in time.
The correction today reverted to the bitcoin value of a week ago. A couple weeks before the corrections were the bitcoin value reverting to the value of the previous week. Basically unchanged.