Use VPN. Some users here are experiencing that problem also. So try using vpn to bypass the blocking. If your country prohibits visiting cryptocurrency related site, then cryptocurrency is more like banned in your country. Is cryptocurrency there is banned? Very sad for you. Don't use ordinary VPN because they can easily traced by ISP and you'll end up suffer with the consequences.
Using VPN can solve the problem of being able to use the crypto-related website including this forum, but this cannot solve the problem that he might face in the near future. His earnings might not be able to withdraw due to the circumstances, banks may freeze his account nor able to withdraw it in any kind of service if the country prohibits the use of cryptocurrency.
If their government is not supporting cryptocurrency yet, there is no point forcing himself to use it, he can just wait a little bit and patient till he overcomes it because I still believe that majority of the countries as time goes on will begin to accept the use of cryptocurrency including his country, but if he is to use it for trading, I think there are still many ways he can go round this, and the best way is to use PayPal.
Although PayPal is not linked to cryptocurrency yet, but if he has a friend in a country that can create a PayPal account for him, he can be sending his coin to a local exchange that can send money to PayPal in another country, and form that country they can transfer money to his own PayPal account, tagging it as business money, which he can then change to his own money and I think with that, banks would not be able to see any trace of crypto money in it with the vpn he will be using.