Since you mentioned in your post that you plan to hold for a long term it means; the funds that you’ve invested won’t be needed anytime soon and if that’s true I’ll suggest you stick to it and look for other means to generate funds to support those businesses that you want to support.
I agree, it's the best if OP don't move anything from the bitcoin that he already has and instead use the future money that's supposed to be for increasing what he's hodling to support that business. One thing I've noticed in that problem is that OP didn't mention if it's his business or not, he's just saying that he's supporting a business that's accepting a crypto, now unless I know if he's an investor to that business or he just wants to support it, I would be giving a different answer. If he's like a part of that business then maybe he needs to do some investing in it or something like that but if he's not then I guess what Cantsay said is what OP should follow or maybe just stick to investing.