I agree, bitcoin needs to remove the hardcap on its controlled supply.
SOmetime very soon, e.g. 2020-2024, 90%+ of bitcoins will have been mined. At that point, one can easily argue that through lost coins + satoshi's coins that bitcoin will become deflationary: the block reward (3.25) will not be able to usurp what is being or has been lost from the network.
That will cause bitcoin to become a deflationary commodity.
Since the block reward cannot defeat what is being lost on the network, bitcoin's value will rise due to its pure scarcity. This will absolutely create a bubble, but one that cannot ever be re-flated... this would be an endgame bubble. If you are looking to exchange fiat into bitcoin somewhere between 2020-2024, you will be faced with a reality where 95% of all bitcoins will already have been mined and its monetary base will decline forever into the year 2100. Also one has to consider that if bitcoin does ever reach a deflationary state, you may also see transactions decrease because people are discincentivized to spend bitcoin when its value is increasing. If that occurs, miners will lose fees, and bitcoin's network security will suffer because the block reward will be negligible.
This is of course assuming that in 2020 bitcoin will be worth more than it is today. This also does not make any assumptions as to what blockstream can accomplish, or bitcoin 2.0.
There's no doubt in my mind that for bitcoin to truly succeed, it's monetary base needs to be expanded.
because where we are today in terms of development is far behind where bitcoin is as a finite commodity (that has been mined 66% already).
you are assuming that removing the supply limit would just mean keep mining a small % of coin that will not influence the final deflationary nature of bitcoin, but this only if it is around the 3.25 coin per block as you have described, or less
but actually i cannot see any reason why miners should mine everything above a small value the one from fees, if the price will skyrocket, and if not their tech would be so advanced that consumption will be non existing,
and with the fact that, they will probably roi'd on every equipments, they will have no reason to stop mining, so miners don't need other incentive to keep mining