Inflation means nothing to me because the growth rate in terms of users will far outweigh that.
The inflation rate is only 9.25% and going down .25% roughly every year.
So yes, when it does it, it wont be 256M...maybe 325M...so the blockchain is worth $325B...still a small number.
How many years, I dont know but I would not be surprised to see it in 3-5 if the growth rate accelerates.
SMTs can really add a lot of people to this blockchain very quickly.