When you embark on a run in , there are tons of different currency types you can collect while in the Overgrowth. With so many sources of currency, it can be hard to tell what each is used for at first.
While some currencies are spent back at the Hub, others can be utilized throughout a run to grab new gear or important resources.
As of this time of writing, seven types of currency have been discovered throughout various runs. The Early Access for likely does not include all the currency types that will be available in future updates and the game's eventual full release.
That being said, learning what each of the base currencies does now will give you fundamental knowledge that will be useful on multiple run attempts.
The most common currency you'll find in is Bright Blood, which drops most of the time from defeated enemies around the Overgrowth.