Yes you do, that's not how the big boys do it. Lets say the price is at $27,000 and they want to buy 10,000 they'll tell the broker I want 10,000 all under $27,500 at that point they'll go to work and find them there 10,000. Some times there is no supply and it causes the price to rise. Microstrategy's original buy of 21,000 bitcoin back in August 2020 was done without making the price go up. All around just a little over $10,000. 6 months later bitcoin was over $50,000. Eventually taking this bitcoin out of the market the supply dries up and price rises.You don't buy 10k BTC, using any method, without directly raising the price (unless there are countervailing pressures pushing it downward). Breaking it up and spreading it out over 2 weeks doesn't change that.