people who seek to profit from an expected shift in an exchange rate by selling the currency expected to depreciate and buying the currency expected to appreciate, then exchanging the appreciated currency for the depreciated currency after the exchange rate adjustment

Many, perhaps most, of the people described as investors are really speculators, buying in the hope of selling at a profit within a short time period.

people who are interested in making money in a short amount of time in the stock market

Those who use options to take on risk and the potential gains/losses associated with that risk.