Absolutely! But how about a quintillion? Signed 64-bit integers give you 8 quintillion in the positive integer space, and unsigned gives 16 quintillion. The qu

Absolutely! But how about a quintillion? Signed 64-bit integers give you 8 quintillion in the positive integer space, and unsigned gives 16 quintillion. The question is: Will the difference between 8 and 16 quintillion matter enough to say "unsigned by default"? But currency types need to be signed anyway, so I guess that's that ;-)