2/ Among other things, money solves a coordination problem. Trading a single good against others solves the combinatorial explosion of a barter economy. It is a scalability solution that allows coordination across large groups of people.
5/ A decentralized system can't rely on our human concept of time. A trustless, non-local time is required. Trustless, because we must not introduce a third party. Non-local because we don't have the luxury of a central frame of reference.
6/ Bitcoin creates its own sense of time using two essential building blocks: causality and unpredictability. Causal links are settling the past. Unpredictable events are opening the doors to the future. The chain tip is the eternal now.
12/ Thanks to everyone who helped with this piece: @Croesus_BTC, @FriarHass, @citizenbitcoin, @skwp, @joernroeder, @SwanBitcoin - and thanks to all my supporters. I wouldn't be able to do this without you.