Hello, tell me about your experience, how long does bearish pressure last and how do you protect yourself from it? How do you set stop losses and return to trading?

I entered the exchange in 2024 and since 2025 my balance has only been falling. I entered with the idea of long-term positions and I don't sell, I only gradually buy more, that's my strategy, but I don't know if it's worth investing further. I want to understand and gain experience so I don't make mistakes.