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We know that Bitcoin price is manipulated, but especially now, it's manipulated more than ever.
Few hours before CME Bitcoins contract expired, wales have set some shorts for BTC and dumped a load of coins. This way, they bought cheaper BTC and made some money in the meantime.
I see that BTC will have a pump after today, so they can play long on the contracts.
The yellow area is the dump but it had dumped more because of people panicking.