S: (adj) bad, risky, high-risk, speculative (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"
S: (adj) long (involving substantial risk) "long odds"
S: (adj) wildcat (outside the bounds of legitimate or ethical business practices) "wildcat currency issued by irresponsible banks"; "wildcat stock speculation"; "a wildcat airline"; "wildcat life insurance schemes"