Actually, Bitcoin became rather like a "gold" currency 
What the guests can attract is rather a payment gateway which makes it possible to pay with cryptocurrencies generally. I mean that in this case, a terminal should "ask" to select a preferred currency to pay with, that's what will make a difference.
almost always when I translate 0.05 or 0.5 Bitcoin, then for a full translation takes about 2 hours. Therefore, by the time the transaction takes a very long time and I think that even for the payment of a restaurant of this time too much. What the guests can attract is rather a payment gateway which makes it possible to pay with cryptocurrencies generally. I mean that in this case, a terminal should "ask" to select a preferred currency to pay with, that's what will make a difference.