By using dozens of filters, you can refine the results and see whatever you want.
For example, 66,237 .com domain names contain "coin" and are listed for sale on marketplaces: https://dofo.com/search/?contains=coin&on_sale=y&extension=c...
You can also check the popularity of any keyword on the trends page: https://dofo.com/trends/keyword/coin It says, how popular is the keyword, how many registered domain names exist with that keyword, what percentage of these domain names are used actively as a website and more.
As for the registrars; yes Godaddy is the first one with about ~70 million domain names under management and Namecheap and Tucows are following it: https://dofo.com/registrars
Disclaimer: I'm the co-founder of dofo.com