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.
The crypto market has historically shown some seasonal patterns, although it is important to note that these patterns are not guaranteed to repeat in the future. Several factors can influence the behavior of the crypto market, including investor sentiment, market trends, and regulatory changes. Additionally, some peoples argue that there are seasonal patterns based on investor behavior and market sentiment. The behavior of the cryptocurrencies market is influenced by a variety of factors beyond seasonal trends, including demand and supply disparities and the market's interest in the product.