The growth of Bitcoin ATMs worldwide has gone from 4.090 (January 2019) to 6.708 (January 2020), which represents an increase of 66,21%. Nevertheless, the core volume still resides in the US:
US (gone from 2.295 to 4.535 in a year up 97,60%)
Canada (gone from 615 to 682 in a year up 10,89%)
UK (gone from 201 to 283 in a year up 40,80%)
Austria (gone from 257 to 175 in a year down 31,90%)
Spain (gone from 61 to 71 in a year up 16,39%)
Switzerland (gone from 46 to 84 in a year up 82,61%).
Data derived from
https://coinatmradar.com/charts/growth/Its not that big a thing really, but rather much more of a niche product (as opposed to a do-it-yourself approach on an exchange), and as such, with a limited scope of reach. Whether the numbers will rise wildly and the geographical scope further extended is yet to see, and will largely depend on how thing progress (usability, usage, legislation, costs, KYC, anonymity, etc.).