Of course, in reality, the chance of an increase in value pretty much balances out the risk of a decrease in value. If you want essentially zero risk, Tony provides that service, and it's still cheaper than credit cards.
Yes, but HOW... I would either need to shift my whole cart to a new platform, or do everything by hand (and still pay the exchange fees). Both increase costs. taking bit-pay as an example I only save .59% over pay-pal (16 cents on the average transaction.)
Perhaps, but you do save. If the bitcoin trade volume never amount to much, you've lost nothing for trying it;