Why does Mr. Linder come to the Younger apartment in A Raisin in the Sun?

comes to the Younger apartment to convince them to sell the house they've purchased in Clybourne
Park.

The Younger family receives money from their father's death. Their
mother uses some of it to put a down payment on a home in Clybourne Park; it's a safer
neighborhood and predominately white. The Younger family is black.

When
Mr....