Bitcoin is an example of a safe payment method on online selling. There are many ways to accept payments nowadays. You can also use Bank transfer or paypal to make is safer you should do it for your own risk. Many online shops now accepts bitcoin as the payment on there products. Online selling will become easier with the help of bitcoin.
Using crypto is still not safe for transfer due its irreversible transactions, once we mistakenly send into different address, we can't recover it anymore but we are in the look for that and to make sure that we are sending into the right one.
Her in our country(Philippines) we are enjoyed of using Bitcoin, ETH and XRP transfers and as well as using it to buy some stuff, it is also accepted to pay our bill even though it is not yet legalize but at least the government never shows of banning it.