Among these crypto whales there are a lot of those who respect this market and they will never play dirty. However, the presence of these whales on the market is a big risk for ordinary traders.
Exactly so, they hold for a long time normal traders trading for short-term profits and they do not have the patience to make the most optimal profit. I saw a Poloniex user account in May 2017 bought an amount of XLM equivalent to the exchange rate of about 1000BTC at the time. And later that year XLM took off alongside Bitcoin. If you pay attention and follow the way of the whales with the same patience, you definitely won't lose.
We can say that whales are one of the big supporter of crypto but due to the large portion of the coin they hold, they have the power to manipulate the market especially if those whales will coordiante with each other but the fact is they will not let the crypto market goes to zero because they gain profit from it and a huge amount of their money is at stake.