I'm aware of what mining is. And you're not just signing a block. No one would be making custom ASICs and putting server farms near hydro-electric plants if all you had to do was sign a block. You're paying people to do useless work and it's silly.
Because you lose far more with Bitcoin. Bitcoin is currently doing as many transactions as a small community credit union, but it's got server farms all over the world and thousands of individual computers and ASICs running 24/7 to "secure" it. It's totally out of control.
