speculative

(s) 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
high-risk, risky, bad,
(s) not based on fact or investigation
- a notional figure of cost helps in determining production costs
- speculative knowledge
notional,
(s) showing curiosity
- if someone saw a man climbing a light post they might get inquisitive
- raised a speculative eyebrow
inquisitive, wondering, questioning,

high-risk risky bad notional inquisitive wondering questioning

speculation

speculatively speculativeness