This is really encouraging and good, i really love this information.

It should have been 25.8% to be precise. Look closely (:

That was a smart response. On a serious note, the guy is right. Predicting what will happen 20 years later is impossible as the assumptions would be according to today, and a lot of things tend to happen in the coming 20 years. Mathematics and graphs are good but based on assumptions and assumptions fluctuate.

If bitcoin needs to be adopted as a currency, its price needs to be stabilized. It is unreal to expect people to accept bitcoin as a cureency and adopt it if the price is different by inappropriate margins every other week.

The chart is the truth

So every day less new bitcoins mined? This is nice.

The process you describe is correct, if you plot it as in OP, it shows an asymptotic convergence on 21 million (20999999.99999999 around the year 2141) when the last satoshi will be mined.

It is due to the underlying geometric series, ratio 1/2,

10.5 million * (1 + 1/2 + 1/4 + 1/8 + 1/16 + ...) = 10.5M * 2 = 21M,

where the 10.5 million comes from the first 210,000 blocks @ 50 btc per block and the ratio two is the halving Bernoulli spiral.

http://www.matematicasvisuales.com/english/html/analysis/seriegeom/seriegeom2.html

If by the 2140s we need more satoshis then the significant digits to the right of the decimal place can be extended in the protocol without affecting the 21M btc limit and mining for btc will continue.

The price of bitcoin inflation is directly connected to time since the algorithm was designed with time being one of its main essences.
So I believe that as more time passes more Bitcoins are mined and less will be available to mine while the difficulty will be insane. So, the price of bitcoin over time should go up!

You misunderstood everything.

The difficulty is regulated so there will be a block every 10 minutes.
Every block have a reward of 50 btc until block 210.000, then it become a reward of 25 BTCs until block 420.000.
Every 210.000 blocks the reward is halved by the protocol.
Asymptotically it go to 21 M BTCs.

all currency in the world must be experiencing inflation,including bitcoin. but certainly no one who knows when it happened