Hello, @Denys_S .
Thank you for reaching out and posting this question!
You can hide the shipping address fields on the checkout pages if your products do not require shipping, such as selling digital goods and services (eg. ‘12 Things to Sell on Shopify’). When adding a product or editing the product details, you can indicate that the product is not a physical good and the shipping address requirements will not appear for these items at checkout.
If you’re looking to sell digital goods, such as videos, music, ebooks, or graphic arts, then I’d recommend taking a look at using Digital Downloads. However, for specifically NFTs, then you’ll want to take a look at Shopify’s NFT Beta Program.
I’d love to hear more about your business! What kinds of products are you selling? Was there a different reason that you need to hide the shipping address/use a fake address for customer orders?