I would think the easiest way to make it would be to first make a loop that fits around your head. Twist the ends of the wire together, or loop them (so that the two loops hook together). You could even solder or glue them together (with jewellry glue). Once you have the loop, start at the back and wrap one end of the rest of the wire around the crown base, then form one of the spikes. At the end of that spike, wrap the wire around the base a couple of times, and keep going. Alternatively, when you wrap after a spike, wrap it back underneath, and then loop across it to make the next one (like in your picture).
I made a picture!
Here!
I would suggest heading to a hardware store and grabbing some heavy gauge wire, or an art store and grabbing some heavy armature wire. Remember, the smaller the gauge number, the thicker the wire.
no leap in logic is too extreme... for RAGE!