Careful with who you endorse on the cards, some of the big names like Coinbase have become centralized monstrosities. Perhaps focus more on the qualities of Bitcoin. Also in general people get spooked by internet things which require bank accounts, maybe don't mention that.
1) Instant transactions
2) Completely anonymous if you choose
3) All transactions documented forever
4) Your money will never be frozen
5) No restrictions on how much you can send or where you can send it
6) Extremely low fee of ~5 cents even if you send $100 million to the other side of the world
7) Cryptographic security makes Bitcoin even safer than banks
8] Expand your customer base since you can receive payments from anywhere in the world
9) Potential for significant profits as Bitcoin becomes more valuable with time
10) The future of money
It should only list the advantage to the business. Those are all advantages of Bitcoin but a business just wants a simple "how does this benefit my bottom line?".
I think a payment processor should be listed because most businesses don't care about the politics like we do. They don't care about XP or Core or BIP100 or whichever. They want simple, 5 minutes and I'm accepting this thing that brings me more customers. I've only set up a business with BitPay so that's what I went with, I know it's easy.
The "add your bank account" part lets them know that they'll be getting paid in their local currency. Could probably specify that.
Could also say at the bottom:
For other Bitcoin payment options try "XYZ, abc, etc."