u/DecentTree1619

I'm thinking of starting a campaign with my family. I am the only one who has ever played but they all enjoy these kinds of things. The campaign I want to run with them is a pirate campaign. The key component of this campaign is that instead of milestone or xp as a level up factor, the party levels up depending on how much gold they have. This will make it so they will have a need to bury their treasure to protect their levels, as well as make the level up system more interactive. So, my overall question is, does this sound like a good campaign idea or should I come up with something else?

P.S. for those of you who might recognize this idea, yes i did get the level up system idea from a YouTube video. I just thought it would fun to play.