Surely your not suggesting that Jesus is saying that all Christians must sell all their possessions to enter heaven? I believe you take scripture out of context in many areas. Notice the last half of the verse.
and come and follow me.
The rich young ruler was not willing to give up all his possesions to follow Jesus and that was the point, not that you must give up all possessions to follow Jesus.
"He who will not leave all and not look back is not fit for the Kingdom of Heaven."