Almost all big companies should be converting their BTC to fiat in large increments.
And also adjusting their prices in accordance with changes in BTC to fiat rates.
I'm guessing he means bitcoin specific companies, or maybe I'm reaching. It's not a big deal if a retailer falls away. If Bitpay or Coinbase decide payment processing wasn't viable any more then that's a proper hiccup.
I hardly doubt that. There is no logic in that. If Bitcoin reaches $100, anyone who accepts it via Bitpay won't get hurt at all.
If he's thinking about the shops that don't convert it to fiat, they aren't going to get damaged either. How are they going to get damaged if they are holding their Bitcoin?