You don't need to start a podcast or write a book to make a difference, you can just spend more time with the people around you.
Since Bitcoin has given me my time back, I've helped family and friends learn about sound money and get started stacking. I've helped friends save money by babysitting their kids at no charge, visited family and helped them with housework, fix transportation issues, and was present when they needed someone.
Helping the world can mean helping a lot of people a little, or helping a few people a lot. They're both meaningful, but one is much more personal and strengthens relationships in your local community.
Bitcoin is just an IOU for time, and there's no better way to redeem it than for those you love.