Not easy.
The hardest things are:
Only 17 (later 21) million units;
There are about more than 5 billion people;
You can not distribute it,
The end price is unpredictable
The end price will always remain unpredictable and as much as people keep seeing so much value for it, with a high rate of adoption, the more it keeps getting better.
As it is, the need is increasing and we will end up having more investors and what makes it interesting is the cap limit which makes even the little number of satoshis to end up being worth something later on. So, the way is see it is that we have 2,100,000,000,000,000 satoshis to go round.
Obviously no one here knows the end value of bitcoin because at present not even all of the bitcoin have been mined, plus the bitcoin users are increasing day by day which is expanding bitcoin market on daily basis. Right now no one knows about the limits of bitcoin so it is quite absurd to get worried about the end price of bitcoin. It is better to focus on present price and take advantage of it.