That's the size of a correction in the stock market, it's normal.
Not often. Once every few years maybe, but it doesn't happen once every two weeks like it does in BTC.
Even if there's a correction and then a recovery, BTC's price growth has still been very unusually rapid over the past year, and a lot of it has been pretty rapid. It's worth worrying about for sure.
I will be really surprised if we close out the year above 10k....
You'd be surprised. Bubbles can last a long time.