Coins - TinyModularThings/IC2Classic GitHub Wiki
Industrial Coins are items which can be used for a Economy System.
The only way you can obtain them is via creative mode or if you buy in a Trade-O-Mat on a Money Trade.
There are 6 stages.
All these stages have different Money Values and can be combined or turned into smaller coins.
Each stage is an 8x multiplier of the one before that.
This is meant for multiplayer so people can have a item for money if they want it.
That is the reason why they are uncraftable.