A speculator is someone who takes risks in the hopes of making a profit. A PLAYER is someone who engages in a game or activity for enjoyment or competition. An ADVENTURER is someone who takes risks and seeks out new experiences. A GAMBLER is someone who takes risks with money or possessions in the hopes of winning more. An OPPORTUNIST is someone who takes advantage of opportunities as they arise. A THEORIST is someone who develops theories or ideas. An ENTREPRENEUR is someone who starts their own business. A BULL is someone who buys stocks in the hopes of selling them at a higher price. All of these terms can be used to describe a speculator, someone who takes risks in the hopes of making a profit.