Personally, I can't deny just how valuable it is to be able to communicate in both languages, and even sometimes more than two languages; my children speak three or four languages so well that it makes me feel inadequate sometimes. It's an asset for Canada.
So if we want this asset to remain, then it's French that needs protection. English is not in any danger because it's the international lingua franca. If we want to preserve the concept of two official languages in Canada for people who have a cultural background in both languages, then it's French that needs to be promoted and protected.