Also we need to remember that those odds could grow if you have a lot of them. Let's assume that there is a lottery, and this lottery has 1 billion tickets, that means if you own 1 ticket, the odds of you winning one would be one in a billion.
However, if you buy half a million tickets, suddenly you have a 50% chance of winning right?
You have a 0.05% chance of winning, not 50%!
Also, if every lottery ticket would cost you 100$ like the gear above, you would pay 100 million for the billion chance!
Now, what happens if you spend billions buying 99.99% of them and you lose?
![Cheesy](https://bitcointalk.org/Smileys/default/cheesy.gif)
Everyone should try their luck with it.
If everyone would try it we would simply add another 3th/s x7 billion, so 21 Zettahash, slowing our chances by another 30 times if those were not low enough.