Market makers do this intentionally; when chips are concentrated in the hands of a few, the price will rise. Retail investors hold their chips too dispersedly, so when the price rises a little, they sell, making it uncontrollable. The cost of recovering is too high, so it can't keep going up. Additionally, market makers need to constantly sell high and buy low to increase their trading capital, which requires ongoing cleansing. This is what makes a healthy market. If the market keeps going up without looking back, I wouldn't dare to enter.