The greedy man returned to the old man with the last 32 copper coins left. Reasoning forward, the fifth man left the old man before walking back and forth with a copper coin: 32÷2= 16 (pieces); When the fourth one came back to the old man, he had copper coins on him: 16+32 = 48 (pieces) ... The reverse process can be listed as follows:

Therefore, wealth is the original 3 1 copper coin.