Probably the reason for this is that it has everything to do with the source of the Bitcoins..maybe these are fresh Bitcoina from miners.. because if this was done from an exchange 💱, the reaction of price would be almost instant! If you have tried decentralized exchanges like Etherdelta or Forkdelta** hope I got name spelt correctly** whenever you bought or sold coins there, you could see that candle almost immediately, even on exchanges like Binance, if you trading some low liquidity coin you can see this phenomenon... otherwise this  shows that Strategy has our best interests by avoiding making markets very volatile...