If there's one thing we learned in the last few months is how volatile BTC is. Reports of such "crashes" are really non-news.
Edit: 10% drop is considered a "correction". 20% drop is usually a bear market.
How many of these multi-dozen-percent downward fluctuations will it take before those storeowners and shops that take bitcoin stop doing so or start maintaining an insane markup on Bitcoin prices?
You should know that you don't actually have to hold bitcoin to accept it as a payment method. Services like Coinbase let you instantly exchange it to cash if you use their merchant tools, so the merchant is actually exposed to zero risk.