As interest rates rise, homebuyers are turning to potentially riskier types of loans—such as 2-1 buyouts and interest-only mortgages—that generate higher monthly payments. Industry experts don’t expect another mortgage crisis like the one in 2008, but consumer advocates warn against these less typical loans. “I’m feeling more and more of the urgency as opposed to people sitting on the sidelines to see what happens with prices,” said Nick Holeman, director of financial planning at Betterment.