Bitcoin was designed to be a currency so you can only use it as a payment method for your business, and you can't do anything else with it. And if you are looking for business ideas based on bitcoin, the same way children's toy designers rely on superhero movies to create models of Marvell or DC superheroes, you can also take advantage of this idea with bitcoin. It will all depend on your field and expertise as well as the demand in your area, as coolcoinz suggests: physical coins, logos, toys...

For example, in my country, some fashion businesses sell clothes, hats, shoes...all with bitcoin logos or related to cryptocurrency. In addition, there are cafes with spaces and interiors designed with bitcoin logos or images, and Lego bitcoin models are displayed around the cafe...