lol, maybe you could go back in time and add some value with Blockchain or Big Data too!
Is your business profitable? Maybe a small sustainable business isn’t exciting to someone who is seeking a moonshot but it seems like you’re looking for recognition and business fame rather than actually solving customers’ problems.
In my opinion, open sourcing your product won’t magically make it more attractive to more people. It sounds like it already only fits a small niche and that’s probably fine.
If you want it to help more customers I would evaluate your product market fit as well as your marketing efforts first. Have you maxed out your addressable market or do you need more effective marketing, pricing, or something else? Is there enough business pain to justify the existence of your product?
Open source won’t really help you solve those things, it’s just a code license. In my opinion, customers of CRM/ERP products don’t really care about whether the code is open source, they care about whether the product solves their business pain, lowers costs/risks, increases productivity. E.g., if we open sourced AOL instant messenger that wouldn’t make it a more popular product than Discord.