economy problem causes because of few of the country does not accept btc and may some of the illegal activity will cause
so their government block btc in their country
All governments want to track the all transactions whether it is legal or illegal money. As long as they can't track those transactions then surely most of them don't allow it. As of now, bitcoins are more popular in the gambling industry and porn because people wants to hide their identity. Because of these non-traceable issues, governments are not accepting it.