There are a lot of things happening in dCITY that not many people know about. For example by just holding SIM you can influence the game settings and also receive rewards based on your SIM power. SIM Power is calculated from average 30 days SIM holdings snapshots before distribution and you need at least 8000 SIM Power to be able to receive the rewards.
That's one of many things happening in dCITY. What's also very interesting are the auctions. Every day there is a random card, a ProGamer card and one NFT auctioned.
I don't know if I was really lucky yesterday, but I managed to win a ProGamer card with my small bid of just 20 Battle tokens! At the current prices this card cost me less than 0.1 HIVE and it increases population and income by 1.
I even managed to buy my first NFT called Influence from 
See the auctions for yourself.
Good luck!