It is simply impossible to calculate all the IP addresses and therefore the number of people who own bitcoin.. Some people own huge amounts and some small shares of bitcoin and they are constantly moving, so it's just unrealistic.

It is very difficult to determine this in numerical terms, but it is very clear that at the moment we hit the worldwide, it is very little. Although it seems to be too late for us, it is certain that the ones in this market will come to very good places in the future.

Just like Dollar bitcoin is now international currency so we can not specify this to any group and people have bitcoin and they are good in this market because they can try to recover the whole market while the new users use this for short time so then they can not grow up and those who have bitcoin they are the big profitable people in the world of modern era

In my opinion, it is very difficult for us Bitcoin users to be able to predict in detail how many Bitcoin users today, but I am sure the number will increase as each country legalizes this digital currency technology so that people's interest will be higher to adopt Bitcoin.

Quite a lot if people are in possession of Bitcoin irrespective of the quality and only a few, mostly referred to as Whales, possess quite a lot of Bitcoin.

its so many people are having bitcoin because they believe that bitcoin is so great for them, and as for me bitcoin is good to be our investment because someday it will help us to our future and i believe that soon we'll be wealth

The amount of people that actually own btc is still a very small percentage.  I still consider this the early adopter phase.  I'm the only one in my entire family and group of friends that even owns cryptocurrency.  I know a lot of people think it's too late to invest in bitcoin but we still have a lot of room to grow.

There is a difference between those people who know about the existence of Bitcoin, those who own it and those who use it.
I think that no one can give a number, but when it comes to the percentage share in the whole population, it is less than 1% of people who use Bitcoin, maybe even less than 0.05% of whole population.

Wow, the post was almost over 7 years and I had to say that the evolution of BTC from 2011 up to now is quite astonishing, and just to repost the link of the  status of BTC way back 2010, here it is: https://bt.irlbtc.com/view/2346.0
I am quite astonished of how it evolved and I do wish that it grows more, I know that we are having a quite upsetting year end for BTC, but one thing I wish is that the price would at least go high before the year even ends.

Nobody can calculate it because there is no any method to calculate it. However, we can say this thing. Many people are using the BTC. We can see lots of BTC transactions are doing here. It means Many people are using the Bitcoin. However, if the governments are legalizing the Bitcoin to use as a currency, then all the people will use this.