Essential Graphics limits Point Control to 32,768

I would start with Dan Ebberts's Universal Counter.  With that as the basic starting point, you can control the number of decimals and commas and add a dollar sign to the result. You can use Layer Time to set up the speed of the animation or add some sliders to get the numbers to animate. You can even control multiple instances. 

Another option is to animate sliders and combine the result by combining the values of the automated sliders. If you set a keyframe for the thousands slider at 100 on frame one and then 999 on frame 20 and just added a loop out to that slider, you generate a counter that you could create a loop that spins through the first 3 digits from 100 to 999 over 20 frames. This will give you an endless set of digits for the hundreds column. Add additional sliders for the thousands, millions, and even billions, and then just combine their animated values in a text layer by adding them using a + for each slider and putting the commas in quotes. 

That's apparently because some of that stuff does use legacy AE API functions instead of the newer ones. Depending on what you need, you could probably create some expressions so the counts can be multiplied or offset by combining two slider values. Entirely depends on how far you actually want to go and whet the increments are supposed to be. more specific info would certainly help to outfit you with some code bits.

Mylenium