There's a huge possibility on the crypto spread in every person when everyone must agreed to used cryptocurrency as they currency.
For now, it was difficult to happen because there are some country do ban crypto by using on it so soon if maybe all of the country uses crypto they also encourage to unbanned the crypto.
but if people are encouraged to use crypto it will be difficult because at this time only many countries still refuse bitcoin, so it still takes time for countries to provide legality first then the public will be encouraged to use bitcoin as a transaction or for their digital investments.