Nowadays evrything is getting hacked. The government can manipulate the bitcoin market easily thus stopping the transactions. Bitcoin passwords and addresses should also be kept at some safe place where there is no access of other people. But there are always some ways to acces your account through VPN settings and proxy sites if government bans bitcoins in your country. But bitcoins are still not that secure , we must keep investing them and not keep them for a long time to be on a safe side.