I'm all for businesses trying to "close the loop" but trying to imagine what they'll do with the Bitcoin they earned from me is too wild.
Discussion
If everybody paid them in Bitcoin, they would for certain have to convert most of it because they have rent, rates, suppliers, staff and utilities to pay in fiat.
I suspect that any company who accepts Bitcoin keeps at least a portion of it as the correct and sensible way to build a Bitcoin Strategic Reserve.
That last part is a coin toss for me. I think we're still earlyish on companies figuring Bitcoin out.