when there are assets that have cryptocurrency support it is very difficult to happen because for now cryptocurrency still has no legality that can make cryptocurrency can be used for all payments in the world, so no one can provide a clear guarantee of cryptocurrency because it still does not have support from governments throughout the country.
Or we can say that bitcoin still has to be legalized by majority of the world. However, you can find examples of companies that are actually selling their products and services in exchange of bitcoin and other altcoins. It is just a matter of time before digital currencies of decentralized nature will be legalized by governments, even if they wont want to. The reason would be mass adoptions of digital coins.
What I predicted in the future is each country will issue their own digital currency with different technologies and blockchain could be one of them. I can't see the government legalize decentralized currency to be honest. Government is created with the nature of centralization and it's opposing the cryptos nature. it's just like how china created their own crypto which ofcourse will be modified and become centralized currency controlled by china aswell. It's always like that.