Bitcoin

Bitcoin is the second currency in the game, used to unlock items and can be exchanged with Money in your saves. It can be earned by mining, using "EZ Mining" app on computers.

Exchange

Let's say x is the exchange rate, which is how much money you get per Bitcoin. On start, the game does:

var x = Math.Random(3500, 4000);

which means that x is set to a random number between 3500 and 4000.