Absolutely yes, everyone can use bitcoin. No one was prohibited to use it. As long as they want to use it, they can do it. They can sell it, they can use to buy it, anytime they can dispose it.
Yes, because bitcoin is an asset and at the same time like a currency because it has a digital value equivalent for USD, but as of today we cannot easily direct use bitcoin to buy good on any establishment because still limited numbers of establishment adapting on it, but we can use by converting first into fiat for our local money but you should observed the market situation that its not good to sell bitcoin on this dip.