This question, and variations, appear a lot. I’d like to elaborate a bit.
One characteristic of U.S. brokers is that they’re SIPC insured. That means among other things that the cash, in any currencies, you might have on deposit at IB is insured up to US$250,000. And that’s good, of course. SIPC membership requires significant regulatory oversight.
How about cash held at a broker in Singapore? Is there any equivalent to SIPC? Nope, sorry.
But let’s consider banks in Singapore. Surely they’re safer, right? Well, U.S. deposit insurance (FDIC or NCUA) has a US$250,000 limit, and it’s not all that hard to raise that limit effectively. (That involves strategic account title variations and, if that’s not enough, CDARS.) The limit in Singapore is S$75,000, only recently raised. And that limit in Singapore is much tougher to lift (basically impossible) and only applies to Singapore dollar deposits. All other currencies on deposit at a bank in Singapore are completely unprotected. FDIC and NCUA coverage, just like SIPC, will make all depositors whole up to the insurance limit and at the current U.S. dollar exchange rate. And they do it over a weekend. (Ordinarily U.S. federal marshals and a parade of accountants arrive on a Friday afternoon and close the failed bank, and by Monday morning it reopens — usually as branches of another, acquiring bank. Everything still works for consumers in the meantime, including ATM access and electronic payments. They’re very good at this on the few occasions it’s necessary.)
Anyway, while I and others think U.S. regulators need to be even better, they are very good at these basics — and much better than the Monetary Authority of Singapore is.
Oh, here’s one more: U.S. state regulators are sometimes involved also, and that’s good. The best example of that is in Massachusetts where deposits at state chartered savings banks are state insured to a limit of ... well, there’s no limit! Yes, that’s right, the Commonwealth of Massachusetts will step in and protect depositors at state chartered savings banks who have deposits above the FDIC limit, 100%. I don’t think there are any other banks in the world with unlimited government deposit insurance (from a government of reasonable or better quality), but there you go.
It’s a big world out there, and there are some — OK, many — better, stronger regulatory protections than the rather weak ones in Singapore. If you’re looking for greater regulatory safety then you really ought to transfer
most of your wealth out of Singapore as fast as you can and put it some place safer.