According to a study by CA Security Council, only 2% of customers proceed past the “Not Secure” warnings on an HTTP connection. This means you are likely to lose out on a significant amount of site traffic, simply by whether or not the connection to your site is secure.
The advantages of HTTPS are only going to increase with time and having a secure site now will let you get ahead of the curve and your competition. As data breaches and cyberattacks continue to rise, having a secure site will continue to be more and more important.