Burger chain Shake Shack is reportedly testing whether it can attract younger consumers with bitcoin rewards. Shake Shack is an American fast-casual restaurant located in New York City. It has offices in multiple countries and employs over 6,000 people. The chain has partnered with Block Inc's Cash App to offer bitcoin as a reward for shopping at its burger chain. Customers who use Cash Cards and purchase Shake Shack merchandise through Cash Boost will receive 15% cashback in Bitcoin. It is reported that Cash Card is a debit card that can be used by users of Cash App, a digital wallet owned by Block Inc. The chain cooperates with Block Inc's Cash App. Cash Boost is a rewards program for Cash Card members. The campaign is expected to run until mid-March, and users can search for promotions in the Cash App under the Cash Boost program and the Cash Card tab. The purpose of this event is to see if the food industry can reach younger customers and see if they are interested in other cryptocurrency options.