If you are planning to use Adword then your website must have to fulfuill the adword complaince that says:

"cryptocurrency exchanges are allowed to advertise through Google Ads, but they must be certified by Google, and their products, landing pages, and ads must meet all local legal requirements of the country they want to get certified for." more information is available here: https://support.google.com/adspolicy/answer/7645254?hl=en