OP, I find your topic a bit confusing. Sounds like you wanna invest in Bitcoin long-term, but you also mention something about accepting Bitcoin in your business? Not totally clear if you're trying to invest, use Bitcoin in your biz, or maybe something else? It'd help if you could explain whether youre looking into investing or bringing Bitcoin into your operations - or I guess it could be both.
what if one is not a salary earner ?
It doesn't matter. Your income source doesn't limit your ability to engage with Bitcoin, especially if you are a business owner.