There are all kinds of bitcoin charts out there, but this might be the most important.

Below is a chart of the bitcoin wallet growth holding "n" amount of bitcoins, over time.

We basically have been seeing exponential growth for every size wallet:

(Source: https://twitter.com/lawmaster/status/1170571570655432705)

Yes, people can have more than one wallet, but this shows an incredible rate of growth either way you slice it.