So, I'm not sure if you realize this, but there's sort of a way to glitch the game into getting perpetual energy/currency. If you catch a 'fully fledged forest' habit on fire, it will regrow while it's still on fire and give the player currency while continuously burning, regrowing, and burning again in a perpetual cycle.
You can do this by having a flower patch by a forest and catching the flower patch on fire. The fire will spread to the forest and then be in an endless loop of burning, growing, and earning energy.