bitcoin is easier and cheaper than shitty credit cards. Adafruit.com and many chinese PCB manufactureres already accept it.
This a duplicate vote. There's one with a lot more vote here:
(so please vote there).
I voted 3 points there and will also vote 3 here (although it's probably useless) just to express that this problem is so important for me, I'm willing to waste 6 votes on it
Bitcoin is pretty unstable. I would prefer ordinary currencies and Paypal instead. I can understand why Seeed do not like to introduce that.