Why not 10:1 or 56:1 or 134:1?Because that's the target....a BIG BIG target. Also, its an even triple digit number, divisible by 10, and 56:1 is just dumb.
But mostly because you get what you go after. If you seek the big game, then the big game is what you get. If 100:1 is what you are going after, then you hold on till you get it.

So the target is 100 x.

Which means if one of the stocks we pick hits 100 baggerdom then our $1000 will be worth $100,000.