I may be using the wrong term... but deflationary, means exactly that the currency buys more with the passage of time compared with goods and services. So let's say a kid is born in 2020 and his parents invest 1 bitcoin into a stored wallet. At that point, the bitcoin is equal to the equivalence of $10,000 in today's dollars. Even if the value of the bitcoin goes up by 15% per year (which I believe is fairly modest), then in 20 years that bitcoin would be worth about $200,000 and in 30 years, $900K.
yea that's what I was referring to as well but the total number of bitcoin users will stabilise at some point and so will the price, if deflationary at all at that point it will be a very low % which won't be incentive enough to hold as an investment.
Certainly the rate of increase will NOT be flat... and You may be correct that potentially in the long term the rate would be lower than something like 5%...