Buys and sells of bitcoin plays a great role in ascertaining how bullish or how bearish Bitcoin is and when the big whales buys Bitcoin, it lends an assured sense of legitimacy to Bitcoin, provides liquidity to the market and goes a long way to improve the overall market sentiment which will go on to influence bitcoins price positively.
The market has buyers and sellers, big and small investors, traders with different capital size and order sizes they can put for purchase and sell on the market.
Price in the market is decided by balance between buyers and sellers and their capital that is shown in trading volume and price will move upward or downward if balance between buying and selling leans toward one side.
The question is, what happens when they stop buying?
The market will be alive, not dead. Price as said, will move up or down, depends on Demand and Supply Principle. If demand is higher than supply, capital from buyers is bigger than what sellers are ready to sell, price will move up. Oppositely price will fall down and it is what we will see when whales stop their buying, start to sell, and retail investors can not absorb selling pressure from whales.