Those millionaires just have to ensure redeem to cash before dying
Two points:
- Cash (in any currency) held at a U.S. broker is subject to U.S. estate tax.
- How's that supposed to work? A lot of people die suddenly, without any warning. You can't assume death is like a TV drama, with plenty of time for the person on his/her deathbed to offer a long soliloquy to camera while his/her loved ones grab the laptop and log into a brokerage account. And try to get the funds out of the U.S. brokerage account before the soliloquy ends.

It's ridiculously easy to avoid U.S. estate tax legally if you're concerned about U.S. estate tax. Simply don't hold U.S. estate taxable assets in excess of US$60,000. (Or bequeath your U.S. estate taxable assets in excess of US$60,000 to me.

)
My question seems odd after analyzing more. Since US Citizen himself is subjected to Estate Tax, an alien is not an exception.
U.S. citizens who die in 2025 have a U.S. estate tax exemption of US$13.99 million. In 2026 that figure will rise to US$15 million. That compares to the US$60,000 U.S. estate tax exemption that foreigners have.
There aren't too many people who die with estates worth in excess of US$13.99 million.
So decided to open multiple accounts on my and my better half's name and decided to maintain less than 60K on each of the name.
To be clear, the number of accounts (joint and individual) that an individual has doesn't matter for these purposes. The
owner(s) of the accounts matter.
The U.S. estate tax computation is based on the total fair market value of all U.S. estate taxable assets that the decedent held individually or jointly on the day he/she died. (Joint accounts are nearly always measured based on the total account value, even if the individual who died is only 1 of 58 joint account holders or whatever.) Your estate cannot avoid U.S. estate tax by splitting (for example) US$100,000 worth of U.S. estate taxable assets into two accounts you hold (jointly or individually), each with US$50,000 worth of assets. But yes, you can give somebody else (such as a spouse) U.S. estate taxable assets which he/she then holds individually and separately (not a joint account with you). Each foreign individual gets his/her own US$60,000 exemption.
Singapore does not have any gift tax, but other tax jurisdictions might. And those rules might apply even for certain people living in Singapore. If for example your gift recipient happens to be Japanese, even as a former resident of Japan (within the past 10 years), Japanese gift taxes may apply.