Select your preferred fiat currency and choose Bitcoin King from the dropdown menu. Fill in your transaction details and wait for your payment to be processed.Find the closest place to buy or spend your crypto assets anywhere in the world. What can you buy with crypto? Who are the biggest online stores and businesses you can spend your Bitcoin with? Sign up for coinbase. They have an app and website. Regal Cinemas, Gamestop, Jamba Juice, and Baskin Robbins are among the many other merchants now willing to take the jump into Bitcoin. NewEgg. Pretty simple if you are based in the US. Easiest way to use your crypto to purchase anything is using the Coinbase app. Around 2,300 US businesses accept bitcoin.