WordNet sense 1 (not financially safe or secure):

bad, risky, high-risk

WordNet sense 2 (not sound financially):

unsound

WordNet sense 3 (not based on fact or investigation):

notional

WordNet sense 4 (concerned primarily with theories or hypotheses rather than practical considerations):

theoretical

WordNet sense 5 (showing curiosity):

inquisitive, questioning, wondering

WordNet sense 6 (eager to investigate and learn or learn more (sometimes about others' concerns)):

curious