Imagine you are the boss of some kind of business that deals with physical objects everyday and why would you start to accept bitcoin payments?
What are you going to do with all that bitcoins that you've earned? Hold it? seriously?
sounds like your not a business owner, so your opinion on your imagination.. is just fail.
i am a business owner, i accept bitcoin and i hold them
dell is a business, they accept bitcoin and they hold them
newegg is a business, they accept bitcoin and they hold them
overstock is a business, they accept bitcoin and they hold them
virgin galactic is a business, they accept bitcoin and they hold them
no imagination needed.
as for why..
well its simple. businesses like the ones i have mentioned are not 100% bitcoin accepters, they also accept credit and debit card payments too and the amount of bitcoin customers may amount to only 1% of sales, meaning the other
99% of fiat sales more than covers the re-stocking costs and salaries. thus accepting bitcoin doesnt cause problems. it just acts as a storage of a small percentage of profit.