When describing the currency itself, bitcoin is strictly not deflationary as the supply of it is never reduced, it's actually inflationary for the next hundred years or so until the full 21 million is mined. It might create a deflationary economy in that everything gets cheaper over time, priced in bitcoin. What is so wrong with that? Why can't you expect to purchase more goods in the future than today with the same amount of bitcoin?

There never has been a fixed supply world reserve asset, even gold has always been inflationary. I think it will usher in a "Golden" age for humanity where goods and services consistently increase in quality and value, while constantly reducing in cost. I'm very excited to step into the bold orange world.

P.S. I'm a bitcoiner not a cryptocurrency advocate.