Will the price of the bitcoin will reach so high that no one can buy it ?
There will only be 21 million Bitcoins and there is way more people on Earth so is impossible for every person on earth to have even 0.01 Bitcoin. Totally impossible But of course some will have more, as it is with everything that some hoards full bags. So basically having 0.001 BTC is more then you need.
I agree, people seem to forget about the incredibly limited amount of bitcoin that is available, if bitcoin becomes adopted and it reaches the potential that we know it has even a single bitcoin could be enough to improve your life in a significant way, the only thing that you need to do is to keep holding your coins, something that many people in the forum have understood and that is why they keep holding their bitcoin even in these market conditions.