Right, that is really the other side of what I didn't say. I don't expect Steam to be holding onto bitcoin for very long but if even for the short amount of time they're holding it the price is fluctuating and doesn't offer an equivalent price in USD from the time the user presses pay to the time the transaction is processed, on top of what can amount to a 20% fee it's simply not currency. They'd be better off allowing people to pay them in stocks sold on the NYSE and NASDAQ.
Steam does not hold onto BTC, BitPay collect the user's payment, tells Steam to release the order and writes a USD.cheque to Valve once in a while after taking their cut. The system worked until network congestion and market volatility made it impractical.
The only major online retailer that actually keep their own BTC is Overstock.
I know what an ETF and an Index Fund is (and that is where most of my money is held). My point was that would be great if had such a currency (i.e. is fungible, commonly accepted as a medium of exchange, and is easy to carry & transact) as opposed to something stuck in your brokerage account.
