Yes, for sure, countries in europe, america or this kind of country where the money is stable , paying in Bitcoin would be "just for fun" , but in the countries where the money is not stable (like in venezuela for example) , paying with bitcoin can be very interesting
It is true the big countries are accepting the bitcoin and they are using the real money as well. Bitcoin is the best way to order for the things and to pay even if you are at home, the power and the strength of the bitcoin is now getting high and the payment of the bitcoin will be the choice, it is good to hold the bitcoin for the long time and not to sell at the low price at all. Bitcoin payment is the best way for the payment.
Yes of course you will have to pay if you lose and from your bitcoin wallet you can the lost money to the winner. Bitcoin is just a virtual thing rather it is a currency which is usable as you can use your local paper or fiat currency for buying things. If you hold your bitcoin and does not use or spend them then after some time your investment in bitcoin will be much higher that the initial investment.