Yes, it's holding on to worldly possessions and putting them before God. We have to have the heart where we are willing to let them go, when zacchaeus gave half of what he had and repaid those he had defrauded fourfold, Jesus said "today salvation has come upon this house" it was because of zacchaeus' heart condition, when he heard the truth, he was willing to let his worldly possessions go. As I said, I believe it's better not to build up in this world, God wants us to walk away from the things of the world, not build up in it. And as you said, we should be willing to help when we see the need
Regarding money and in my own life, I believe that we a should earn enough to live on, and not live to excess. And share what we do have, when we see the need. I don't believe in spending wads of money on myself and in our house meeting, we are taught that it's better to come down and not climb up in the world. I believe that we should earn to live, not live to earn.
We are to do the will of God first, and God will look after us. The world will take care of itself. It loves building up and looking after its own.
Those who are last will be first, and the first will be last.
We can't serve God and mammon.