Double-spend Attack is a special badge that belongs into the Earth Badge tier. It's description is "Support Khan Academy with a Bit-coin donation, TWICE!!!"
Contents[]
[hide]#Notable Users with this Badge:
Notable Users with this Badge[]
Extra Information[]
Learn More about Bitcoins here.Edit[]
Learn how you can donate bitcoins to Khan Academy here.Edit[]
If you don't know what a bitcoin is or want to learn more, head on over to the Khan Academy video tutorials and/or watch the simple one below!(but watching the tutorials are better because they give 750 energy points too!_ [1]Older badge imageAdded by 4thdimensionpro