Bitcoin transaction fees

I am relatively new to BTC and have been watching a lot of Robert Breedlove. The idea behind bitcoin is fascinating and I am just about convinced that bitcoin is the ideal currency. The one flaw that I am seeing/failing to understand is that I would think that the "ideal currency" would be free to use. I saw something that the average BTC fee is 3-4ish dollars. How can this be the currency of the future if I have to spend $3 in order to buy a coffee? And my understanding is that the more network traffic the higher the fees. Can someone explain to me why this will not be an issue in the future for bitcoin?