I did that long time ago, around 2016-2017. I offered a 10% discount to all my clients if they pay my invoices in BTC directly. The next tier was standard price if they pay in cash. The lowest tier was: if they pay through bank transfer, will get a raise of 10% on top of the price.

Some clients were surprised about that, some were interested into Bitcoin. Nowadays after years, those that were listening my advice to start accumulating BTC and pay me in BTC, are very grateful to me and always remember that I saved them.

I also did this https://darthcoin.substack.com/p/a-bitcoin-adoption-story