In the first part of your reply, you indicate that you're bad at orders of magnitude, at least when defending Bitcoin. In the second part of your reply, you do

In the first part of your reply, you indicate that you're bad at orders of magnitude, at least when defending Bitcoin. In the second part of your reply, you do the same thing. Let's be clear. (500 x 10^6) W x 4000 ~= 2 x 10^12 W. I will now factor in your fantasy that everyone stops using centralized currency: (500 x 10^6) W x (4000 - epsilon) ~= 2 x 10^12 W. Fermi problems require being confident in how to multiply large numbers, and disregarding non-multiplicative factors that are much smaller.