Let’s clarify “Never sell your Bitcoin”.
Never sell your Bitcoin for Fiat. However, Bitcoiners will take pride in supporting other bitcoiners in the circular economy. Whether your an individual or a business, you’ll forever depend on your supply chain. Sending your suppliers fiat is a guarantee that the quality of your good/service will decay over time.
Rather, you’ll select high quality network participants that offer products/services you believe in. Together you’ll share a vision and cooperate to grow the product and service through time.