As entrepreneurs look to take cryptocurrency mainstream, they’re copying a tried-and-trusted approach from traditional investing: indexing. Index investing is designed to generate returns that are similar to a broad market index. This approach can reduce the risk of picking individual assets that might underperform the broad market. So, in the case of an equity index, instead of picking, say, Exxon, Apple, Johnson & Johnson and Ford, you invest in the broad market. Several new crypto index pr...