What does Pip decide to do with the 500 pounds, and what does Wemmick think of his plan?

Pip decides that he wants to use some of the money to help Herbert's business plans. Wemmick does not agree with his decision.

"Choose your bridge, Mr. Pip," returned Wemmick, "and take a walk upon your bridge, and pitch your money into the Thames over the centre arch of your bridge, and you know the end of it. Serve a friend with it, and you may know the end of it too,--but it's a less pleasant and profitable end."

"--Invest portable property in a friend?" said Wemmick. "Certainly he should not. Unless he wants to get rid of the friend,--and then it becomes a question how much portable property it may be worth to get rid of him."