I'm concerned about human freedom, decentralization of power, individual empowerment, privacy and self-sovereignty.
Bitcoin and open source software play a key part in fighting for these causes around the world that are increasingly important every day.
Bitcoin isn't perfect. Among other things, it needs further decentralization, continued vigilance, review, bug-fixing, updates and maintenance, and improved robustness, performance, privacy, documentation and user experience.
See my articles for more about contributing to, running, and decentralizing Bitcoin Core.