[stackzero]

cryptocurreny != investment scam. It's just another way to transfer and store value.

Interacting with automated contracts is an interesting extension to that system which can make things alot more complex.

The 'dark forest' comes from a kind of man-in-the-middle attack where anyone can see the order book and exploit it, by putting their own slightly better orders in. Hence the need for co-operation with a closed order book (miner) to get the transaction in safely.