One of the best known today is the Grayscale Bitcoin Trust fund. The fund currently holds around 330,000 BTC, which is 1.7 percent of all BTC in circulation. Satoshi Nakamoto is thought to have an apparent ownership of 1 million Bitcoins, and some of the users who bought bitcoins when bitcoin was first launched could also be among these whales. so yes, of course there are whales, but these accounts could also belong to a centralized system that holds people's bitcoins.