speculative

adjective

1. Characterized by speculation; based on guessing, unfounded opinions, or extrapolation.

2. Pursued as a gamble, with possible large profits or losses; risky.

3. Pertaining to financial speculation; Involving or resulting from high-risk investments or trade.

4. Not financially safe or secure

   “a bad investment”

   “high risk investments”

   “anything that promises to pay too much can't help being risky”

   Similar: bad, risky, high-risk

5. Not based on fact or investigation

   “a notional figure of cost helps in determining production costs”

   “speculative knowledge”

   Similar: notional

6. Showing curiosity

   “if someone saw a man climbing a light post they might get inquisitive”

   “raised a speculative eyebrow”

   Similar: inquisitive, questioning, wondering