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.