For the current day, the prices of the main crypto-currencies show a steady decline, what could this be related to? Is it because of some rumors? And as a result - a panic sale?
most likely because most holders of Coin panic sell so that what happens and feels together is the lower price. As for what is happening with the crypto market, it is still experiencing the lowest price due to the end of the year and commemorating Christmas. I think that's why the price of digital currencies has decreased in price.