You can make transactions in cryptocurrency but what next? In order to sell cryptocurrency for Fiat you need to be able to receive payments to a Bank account or card. In countries where cryptocurrencies are prohibited, this is impossible. How can vpn help you with this?
He's talking about conducting transactions (ie, moving value from point A to point B on-chain).
You either choose to not sell anything, or you choose to sell locally for cash, which happens to have gained a tremendous amount of use. Local markets are exploding and there is a lack of coin supply. That's why premium's exist. The fewer the available number of coins, the higher the premiums, and people actually are more than willing to pay these premiums. Some times it helps to be a little more open minded before ruling out other ways of getting things done.