economics question

The cancellation of linked exchange rate system will lead to:

1) fluctuation of foreign currency
2) increase the difficulties of government in controlling and forecasting the economic development
3) more business in foreign exchange trading
4) people will lose the confidence of Hong Kong government because the government emphasis that they will keep the system unchange
5) higher risks for importers and exporters
6) international investors will increase the risk rating of Hong Kong market due to the increase in foreign exchange rate risk