BD787
Point 5 :
If your bank has a Singapore office (and only then) you can place the
money in a locked account in your home country (i.e. a fixed deposit). Your bank (Singapore Branch) will then issue a bank guarantee to SIA. (So no need to bring the cash to Singapore)
It requires some paperwork, but in this way your money will at least generate
some interest. Worked fine 7 years ago.
gb