I think we won't hit an inflection point until the reward halving AFTER next. When 16.5 million coins exist and the reward goes to 1800/day. At that point yearly inflation will be under 4%.
Would you mind proving your statement with a calculation?
From a purely monetary perspective from that point on bitcoin can only outperform fiat currencies. Real world (buying power) performance of course relies on many things.
I think you're thinking a bit too narrow in terms and paradigms of 'conventional' econometry.
With bitcoins we have since their creation seen a very high 'inflation', if defined as increase in coins in circulation, together with a very large and steady increase in value with respect to other currencies and commodities.
Where else has this ever occurred?