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They short the market. This strategy is very popular among crypoto speculators because of high volatility of crypto.
I believe that at the moment this strategy is not working since the uptrend has begun.
An experienced trader can always find opportunities to buy in a falling market and for short in a growing market.
It is even easier for me to find a setup vs the market, since in this case the idea of an asset with this setup is clearly visible.
It's a pity not everyone can enjoy cryptocurrency volatility and competently work with it, increasing capital.