To offer cryptocurrency on your store, you'll need to first sign up for an alternative payment provider that accepts cryptocurrency. From there, each payment provider would have their own instructions on how you can integrate their gateway to your Shopify store. An example isthis document here, where the payment provider has laid out a step by step guide to help with your integration process. As these payment gateways are powered by third-parties outside of Shopify however, just a note that if you have any queries about them I would recommend getting in touch with their support team. You can also read more aboutcryptocurrency here, on our Shopify Help Centre.
Kimi | Social Care @ Shopify - Was my reply helpful? Click Like to let me know! - Was your question answered? Mark it as an Accepted Solution - To learn more visit the Shopify Help Center or the Shopify Blog