The current economic machine works through a credit basis.

Basically this,
Borrowing = more spending = more income for others = more spending

It's a feedback loop that allows for productivity growth.

But it is also dangerous because eventually the debt burden can lead to a depression.

Is this credit economy dangerous in something like cryptocurrency, where supply is fixed and the currency is deflationary in nature?

I'm very interested in projects like SALT, BlockEx, Fortuna, FIC Network, etc which aim to create secondary markets within the crypto landscape. What do you think?