An IPO for mortgage giant Quicken Loans could make or break fintech valuations. 5 VC investors lay out the stakes — and which startups may get the biggest boost.

· Quicken Loans has confidentially filed paperwork for an IPO, according to media reports. While the valuation isn't yet set, it could be in the tens of billions of dollars. 
· VC investors are keeping a close eye on Quicken, saying it offers an important gauge for how investors are thinking about the intersection of tech and...