In the future, people can use crypto currency to pay for their services and personal bills. This I believe very much. However, to implement it, each country will face its own economic risks. Therefore, it will be difficult for them to accept all payments through the crypto currency. I think that crypto currencies need to have a certain stability to make them acceptable or neutral to the crypto currency. And the security technologies and blockchain platforms also need to be further developed to ensure transactions and costs in each transaction are more convenient.