whales can do everything because they have big capital to change the market direction. That is why it is important to read the crypto news daily so that all us as small and medium crypto traders and users have the idea when would be the time to make profit and make investments into the right coin.
One of the good examples of a whale is Elon Musk, he manipulated the market in a way everyone can see, many whales also have big amount of money to manipulate the market, they like the coins that are well established but not yet having enough marketcap, or the one the marketcap and price can be manipulated with the amount of money they have, they pump the coin, the price increase, after the price increase, they dump it for others to lose.