That's the beauty of it - you don't need to use bitcoin to store your capital. Just use it to get money from your customers to a hard-currency account, which I would guess is easier with BTC than with large quantities of physical cash.
There's risk in the movement of a day's cash flow by BTC, but probably not much higher than the risk of transferring cash in your personal car.
"Commonly robbed" is an exaggeration.
When the subject at hand is about companies that don't have an option?
I don't see what problem bitcoin solves for these businesses. The first example in the article is having to take $51,000 in cash to pay the company's taxes to the state. Bitcoin does not solve this in any fashion. I really struggle to find the problem that bitcoin solves in this situation.