A confidence trick (synonyms include confidence scheme and scam) is an attempt to defraud a person or group after first gaining their confidence. A confidence artist (or con artist) is an individual, operating alone or in concert with others, who exploits characteristics of the human psyche such as dishonesty, honesty, vanity, compassion, credulity, irresponsibility, naïveté, or greed

"A confiança que conquistámos ao longo destes dois anos foi um pouco abalada" (aqui)

House of Games - real. David Mamet (1987)