why "everyone" should care about the debt crisis in greece

Is Greece about to go bust? The Greek government says they don't need a rescue package but they are exploring all options to claw out of a mounting debt crisis to cover their near-term budget shortfall.

Investors are still skeptical. Yields on Greece's benchmark 10-year bond are trading near record premiums to comparable German debt after briefly touching a record high on Wednesday. The cost of insuring that debt through credit default swaps is also near unprecedented levels. 

via finance.yahoo.com