Speculative is used to describe activities which involve buying goods or shares, or buildings and properties, in the hope of being able to sell them again at a higher price and make a profit. Thousands of pensioners were persuaded to mortgage their homes to invest in speculative bonds
A piece of information that is speculative is based on guesses rather than knowledge. The papers ran speculative stories about the mysterious disappearance of Eddie Donagan
not financially safe or secure; "a bad investment"; "high risk investments"; "anything that promises to pay too much can't help being risky"; "speculative business enterprises"