Is BTC still a thing?

I've heard a lot about Bitcoin, or BTC, in the past few years, but I'm not sure if it's still relevant today. Is BTC still a thing that people are investing in and using for transactions? How has its value fluctuated over time, and what factors have influenced its price? Are there any risks associated with investing in BTC, and how can I protect myself from potential losses? I'm curious to know more about the current state of BTC and its future prospects in the world of cryptocurrency and finance.