お宝たから

• 宝たからplainN3sense 1

  宝 is the plain noun for 'treasure', while お宝 adds the polite prefix お and is the more commonly used, gentler-sounding form in everyday speech.

• 宝たから船ぶねsense 2

  宝船 is the treasure ship itself (or its picture) tied to New Year's luck, while お宝 in that same sense specifically means the picture of the ship, not the ship as a concept.

Polite form of 宝 (treasure) with the honorific prefix お. The slang sense for 'money' likely developed from the idea of valuables.