A more thorough explanation:

Definition: A speculator is an investor who trades securities with the goal of making a profit from the changing prices in the market. They are often knowledgeable and aggressive in their approach.

Example: John is a speculator who closely follows the stock market and buys and sells stocks frequently to make a profit. He takes calculated risks and uses his knowledge of the market to make informed decisions.

Explanation: This example illustrates the definition of a speculator as someone who actively trades securities with the goal of making a profit. John is knowledgeable about the market and uses his expertise to make informed decisions. He is also aggressive in his approach, taking calculated risks to maximize his profits.