Historical clue formulations

• Wealthy boyfriend, perhaps — 2021-04-27
• Gold digger's goldmine — 2019-10-27
• Husband of a trophy wife, maybe — 2010-09-13
• Wealthy boyfriend, perhaps — 2004-12-29
• Gold digger's target — 2000-12-03
• Gold digger's "mine" — 1994-12-05