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Could you elaborate on the concept of "crypto winter" and its implications in the world of cryptocurrency and finance? I'm curious to understand how it impacts the market, investors, and the general sentiment surrounding digital currencies. Specifically, I'd like to know what characterizes a crypto winter, what factors lead to its occurrence, and how investors and enthusiasts cope with such a period of market downturn. Additionally, I'm interested in understanding the potential long-term effects and how crypto winters tend to shape the overall development of the cryptocurrency landscape.