Will Scotland vote for independence?

[True Federalist (진정한 연방 주의자)]

How do they fix their economic problems so they're qualified to join the EU?

They could always join Wales and Northern Ireland in joining with the Republic of Ireland to form the United Republic of Ireland and Great Britain.  As a successor state to the Republic of Ireland, I would think it wouldn't need to go through the usual accession talks.

[True Federalist (진정한 연방 주의자)]

That being said, Scotland wouldn't meet the requirements to join the Eurozone, so that may reduce trade with non-Eurozone countries if and when Scotland becomes independent.

I'd expect that if Scotland does gain independence then even it doesn't enter into the ERM II the Scots pund will be tied to either the English pound or to the Euro.