Wrong. Many who are daytrading don't even have the hardware to mine a single bit, what they do is gamble with the prices and chances to gai more BTC than they started out with by investing in new altcoins that they think may or may not take off. These are the people that lose a lot of money on a day to day basis to people who have the ability to mine with a lot of hardware and dump the coins that most of the time don't make it anywhere and investors are stuck holding a lot of dead coins.