Bitcoin wavers ahead of Jackson Hole. This Wednesday, August 20, the asset fell sharply, reaching a 17-day low. This sudden drop rekindles suspicions of manipulation, as some analysts point to strange liquidity movements in the order books, evoking the shadow of whales. Others urge caution, reminding that the nervousness could also stem from macroeconomic uncertainty, while the highly anticipated speech of Jerome Powell, chairman of the Fed, looms on the horizon.