The last time someone asked me this question was about three years ago. I talked to the same person late last year and we spent probably close to an hour discussing the status of BTC and crypto market. So you see, it takes time before they change their mind. Just keep doing what you're doing and the numbers will grow eventually.

Do you have companies that regularly orders from you? Maybe it would help if you could send an email that you're accepting BTC with a simple guide how they could pay.