treasure, jewel, precious, rare
寳 centers on something of high value: a treasure, jewel, or anything precious and rare. The meanings all point to an object or quality held in special esteem.
寳 is a variant form of 寶. It combines 宀 (roof) with 珎 (a variant of 珍, meaning rare/precious) and 貝 (shell, an ancient currency), suggesting precious items kept under a roof. The exact historical development of this particular variant is uncertain.
Under a roof 宀, you keep a rare jewel 珎 and a valuable shell 貝: together they represent a treasure.
For ホウ, imagine a treasure chest that you hope to find: hope -> ホウ, and inside is the precious 寳.