Characterized by speculation; based on guessing, unfounded opinions, or extrapolation.
Pursued as a gamble, with possible large profits or losses; risky.
Pertaining to financial speculation; Involving or resulting from high-risk investments or trade.
Not yet determined; undecided.
Not certain; unsure.
Variable and subject to change.
Fitful or unsteady.
Unpredictable or capricious.
Not known for certain; questionable.
Something uncertain.