Why?
A proclamation to my future vassals.
In a republic not far in the future, a free and modern state whose constitution fits on a postcard, I am king. The arrangement is unusual for a republic, but the vote was unanimous, and the electorate was me. My realm exports free software, typefaces, proofs and paint programs to the whole world at no charge, which makes it the only kingdom in history to run a permanent trade surplus in gifts and a permanent deficit in everything else.
A crown, alas, is expensive to keep. The castle needs a roof, a greenhouse wing and a moat that someone has to dredge; the harem must be housed, fed and kept in the silks and donuts to which it would like to become accustomed; and the court astronomer keeps asking for a bigger telescope. Every realm in history has been sustained by the offerings of its vassals, and you are early enough to become one on excellent terms. Lay your tribute at the gate below. In return you will be remembered in the royal chronicles, welcomed at the castle table, and comforted by the knowledge that a king is not working, at your expense, for everyone’s benefit.