The road to $1000 will be exactly 9 times harder than the road to $100.
([$1000-$100]/$100 = 9)
With the assumption that the difficulty ("hardness") to move from one dollar to the next remains constant, which is not true.
Actually it probably does. The amount of difficulty added due to "OMG ITS A BUBBLE" and attention we attract from DDOSers and the like is roughly equal to the "easiness" added by people bandwaggoning and extra positive press and the like.
