I think what’s important is to have content that helps people become financially literate, no matter where they are starting from. In the US at least, high schools are in the midst of curriculum battles over social issues, so that the basic concepts of financial literacy rarely get covered.
So, some people here might need help figuring out the optimal investment balance in their after-tax portfolios, while others may need help making a basic budget and figuring out how to pay down their student loans. We need to make room for all of those.
If we have the capability to start a Wiki, it should have some basic topics there that most people encounter at one point or another. How loans work, how insurance works, what’s the process to buy a car or a house, how to budget to pay off high interest debt. A lot of this advice is region-specific.