I don't think it matters whether it will be the next google, Facebook or Amazon. Equity in a company is a direct reflection of value. Always keep in mind that when you hear things 5-15% as a normal amount of equity, that is more of a guide than a fact. Always focus on the value that the party asking for equity will bring. 10years from now when you have a big problem to solve that's when that equity will matter. Essentially who's on your team and what do they bring to the table now and in the future. Ask your self that question. Here is a tool you can use to help you out with it: https://cofounders.gust.com/