It's normal for a trader to experience losses because no one can predict the market and even profitable traders agree that. But there are many traders who win a lot in a bullish market rather bearish. Here in crypto, if the market is bullish you can possibly earn multiple of your capital and can be up to 50x or 100x, it happened in year 2021. A lot of traders even newbie traders are getting rich because most of their strat are working since the market direction was always going up. But when bearish came up they disappear.
Aside from that, I only base on my analysis in the chart, I won't say Bitcoin is seasonal.
Well, it is easy to look like a genius when the market is doing nothing but to go up, during those moments everyone seems to be obtaining profits, however as we know such a state cannot be maintained for long and at some point a crash follows, it is at those moments when you can see who is really good and who was just being carried away by the bull market, and when all is said and done you can see the majority of the traders on the market were never as good as they thought they were.