Of course they should. Otherwise, how will the real estate market keep up the inflated home prices.
It is like dominoes. Without the new blood (aka new home buyers) coming into the market the people selling their 'starter' homes have no one to sell to and therefore move up to the next level of home purchase. 

This is repeated again at the next level of pricing and so on. Without the fresh people at the bottom the whole thing is going to collapse!

Watch for it....