This is very possible. The Blockchain technology is a revolutionary one with a lot of significance. As the people become more familiar with it, the adoption and utilization of the Blockchain and cryptocurrency will increase which will gradually lead the world to cashless.
What do you mean by "making the world go digital" exactly? Isn't most things already digital including money? Blockchain is an incredible tech and banking institutions are already starting to implement it, but the way they transact with money is already mostly digital. Most of the money in the world is just numbers on a screen and if probably even 20% of people tried to withdraw their money out as cash it would crash the economy. One thing I like about bitcoin though is you can't create money out of thin air or spend money you don't have, but that's where banks make their money.