Until now, Bitcoin is hardly accepted by countries for what it is because it is [1] beyond their comprehension, [2] a threat to their existing fiat system, [3] is neither issued nor directly monitored or supervised by the government, [4] is not owned by a certain person or company which the government could easily communicate, convince, or even threaten when the necessity arises, [5] is somehow anonymous, [6] and so forth. Having mentioned all these reasons, it is really difficult for Bitcoin to be accepted as legal tender in any country.