Every one in the crypto are adding their own share in the crypto market now it is good to say that not only one person control the whole market but many and those who are big whales they are strong in the market and they control the market in a sense that market crash after a huge rise.
That happens many times and often these days due to big whales because when market price increase to the highest level because the currency is doing very well with the economy and gaining investors often a huge drop in price take place with a release of considerable amount of tokens into exchanges so most small level investors who were waiting to gain some profits loose large amount of money