Tips and Tricks
You trade it in the most basic block market trades, but you can also produce brick and concrete with it, and trading those two will be where most of your coins come from when you start out.
Maker machines will automatically produce a basic block over time, which only needs to be collected by you.
Keep your world core upgraded as much as possible and for that you will need to have a certain amount of land squares and enough coins.
Rescue as many citizens as you can! Citizens that live on your land will generate coins over time. This is your second source of income, so be sure to keep increasing your population.
If you tap on a citizen, you can see how many coins they produce and what their maximum capacity is. You also have the option to educate them, which will cause Sinclair to teach them some new tricks.