Answer:
Preservation of value.
Step-by-step explanation:
Money is a medium of exchange that is generally acceptable for transactional purposes.
As seen in the scenario , money may not necessarily be cash as some other items can be used as a medium of exchange in a trade by barter agreement so far the items has the features of money and acceptable.
However , one thing that could be pointed out in the transaction in the scenario is a loss of value of the purple fabrics before the transaction could take place as a result of sudden arrival of a trade ship that caused a surplus in the fabrics , and at the end , it could not achieve as much as was expected.
Therefore the need for the preservation of value of money is necessary and needed