How Many Bottle Should I Order? For the best results, it's recommended to use Billionaire Brain Wave for at least 3 to 6 months. This timeframe will help you achieve your goals effectively. Billionaire Brain Wave can be bought monthly, but it's advised to purchase 3 to 6 bottles as we offer discounts, and that's the minimum needed to seeresults. Keep in mind that this discount isn't always available, so it's a good idea to take advantage of it while it lasts.