As far as I know, there aren't any incentives for companies that accept Bitcoin to hold that Bitcoin, other than speculation. The large majority of them probably just convert immediately back to fiat, putting sell pressure on BTC. Is there anything that the payment processors (BitPay, Coinbase, etc.) can do to incentivize the companies to hold some of the Bitcoin? Something like a reduced fee schedule if you hold X% of revenue in BTC. Ideas?