One thing you can count on is that interest rates will always change!  They are cyclical and subject to influence from many factors.  We know when they're very high that eventually they will come down, conversely when they are very low they'll go up at some point.

Economic factors such as unemployment rates, the consumer price index, retail sales and consumer confidence all create movement in interest rates.  Many people think the key factor though is the relationship between stocks and bonds.

If the economy slows and the stock market is weak (bearish), many professional money managers will move their money out of stocks and into bonds and/or mortgage securities, causing mortgage rates to go down.  If the economy is strong the stock market does well, causing those same money managers to move their money into the higher return of stocks.  When this happens bond issuers are forced to offer higher rates to attract investors away from stocks, moving mortgage and bond rates up again.

Rates currently are at very low levels and there are many, many different types of loan products available to make a home purchase possible.  The easy money for sub-prime loans is gone but there is plenty of money available for average and good credit borrowers at affordable rates.  Real estate is affordable now due to the low rates and the slowdown over the last few years, making good buying opportunities for your next dream home a reality.