I tend to lean on BTC being more bullish towards the end of the year due to the money on the line for options/futures markets. Although I didn't know that the miners were decreasing their outflows. It would make sense if they they have the funds available and can wait until later to cash out.
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Not just that unlike gold miners, bitcoin miners actually want to keep what they mine rather than sell it so they are using the bitcoin they mine as backing to raise debt and then run their operations on debt pushing out the need to sell
That way they sell less bitcoin to cover their debt or even just refinance and roll over the loan at a different LTV ratio