The phrase "all the wealth in the world" represents the idea of having limitless material possessions and resources. It symbolizes everything that many people may desire in terms of riches and abundance.
The assertion that "it would still be you" implies that even with all the worldly riches available, the person remains the most cherished and valuable aspect of the speaker's life. It conveys that their love and presence are priceless and irreplaceable.
In essence, this statement beautifully captures the idea that love and the connection with a special person hold a significance that transcends material wealth and possessions. It celebrates the profound value of the person in the speaker's life, emphasizing that they are the most precious treasure.