Here in the Philippines we could use our local wallet called coins.ph to buy load pay for our electric,water and credit card bills and even book for travel.
Yes you can but the price margin is quite is high maybe around 5-10% which is not advisable to use if you have some fiat in your wallet as ehat others say use only when it needed or if you have no fiat in your wallet
I really don't know why people always looking for bitcoin as an investment, in fact, Bitcoin is just intended to used just like of fiat money and not for investment only. Since it is already accepted to our country(Philippines), then why we don't want to grab this opportunity. Every country have looking such thing also..