Greece fails the next to fall is Portugal/Spain. They fail then France goes down, then Germany and the smaller states. Switzerland will follow, then England will fall. Once that happens US will be on the short list and China will yank all lending so the money will dry up.
China is a mostly export country so when nobody has the money to buy their product they will start to either dry up or internalise their manufacturing which will increase their tech status.
If you have cash invest it in guns ammo and food.
or ya know tinfoil is good too.