The short version is for something that matters like banking information, you as an individual always want https (an encrypted connection that verifies you are connecting to the site you expect and makes 3rd party theft of information much more difficult).
For something like this site where you probably aren't storing any valuable personal information and the likelihood is low that anyone is going to pretend to be the site to steal your personal information, http is probably OK.
However, security conscious people get twitchy when their browser bar has a big warning, as mine does, of "Not Secure".
For more information related to the benefits of having
https://thefora.org, try
https://www.markbrinker.com/secure-https-websiteAnd, unlike Singer's sewing machine, switching to https is free to the user, not on the 10-year, monthly installment plan with the local seller.