speculator
//ˈspɛkjʊleɪtə//
Noun
speculatorSingular
speculatorsPlural
1
A person who invests in stocks, property, or other ventures in the hope of making a profit from market fluctuations rather than from the intrinsic value of the investment.
The speculator bought shares hoping to sell them at a higher price.
2
A person who forms theories or conjectures without firm evidence; someone who engages in speculation or conjecture.
He was merely a speculator who had no real evidence to support his claims.