The coming Economy machine will give the blocks a base coin value.
We did consider adding 2 new economy machines: A recycling machine that would take bundles of resource and spit out something more valuable, and a coin machine that would spit out some coins.
We have ultimately concluded that the coin machine is the best solution here. (I made a post of the forum a weeks back about what the coin machine would do and why.)
Found it:
and here for comments on the possible recycling machine: