@kaniini Beware the #FUD and buzz. I would recommend anything on http://nakamotoinstitute.org for some illuminating reading material.
It is not easy to understand, and after weeks of reading and discussing, it will hit you on successively deeper levels.
Bitcoin/Lightning will displace the current wasteful (mostly human-powered) and corrupt (faith and trust in fraudulent institutions) financial system. (The new system will make the old one obsolete.) That's why it's important.