In the near term SGD may fall against the USD and JPY (as both seen as safe havens). Longer term SGD is seen appreciating esp against the USD. The forward curve tells you the same. Again, SGD falling against other currencies unlikely.
Singapore is a small country without any natural resources and has to import virtually everything. If SGD continues to fall it will make imports expensive for the locals, which is not desirable. Add to that, when it comes to its exports Singapore doesn't compete based on cost but on quality. Hence a drop in SGD doesn't make it more competitive especially in a trade war environment. Lastly, despite being import dependent, Singapore has a current account surplus because it has been able to attract investments with its prudent policies. Now, globally flow begets flow, in other words inflows result in current account surplus and attracts more inflows, supporting / strengthening the currency. The opposite (i.e. outflows) is also true and I don't think Singapore policy makers will ever tweak their policies to do that.