wouldn't it be wiser to do the opposite Gateway ? so any site can start receiving BTC through the gateway and receive their equivalent desired currency ! ? (the value of the btc price on the merchant can be dynamicly changed to meet the merchant dollar,euro demands ). for example if i sell on my site a laptop for 1000$ , as a merchant i will get the 1000$ no matter the market value of the bitcoins. this way the currency itself will gain momentum through main stream sellers without them taking risk. Ofcourse this can be changed once the currency is adopted on larger scales .
im not economist so my logic might be flaued , and would appreciate correction instead of flame