Whats the deal with tax brackets and how do they affect us traders?

I’ve been diving into my finances lately, and the whole tax bracket thing has me a bit confused. I know we get taxed at different rates depending on our income, but when it comes to trading gains, do we really get hit harder if we bump into a higher bracket? Like, if I have a good year and my income goes up, should I be more nervous about holding onto those stocks or cashing out?

I’ve heard mixed opinions about strategies to minimize taxes when trading. Do any of you have tips or experiences that worked for you? I guess I'm just trying to figure out how to keep more of my earnings instead of handing them over to Uncle Sam! Would love to hear your thoughts!