If i want the flexibility to able to transfer to/from a US bank account in USD or deposit a US check and possibility withdrawing USD free with ATM at oversea , which one I should use - My Account or Multiplier account? Thanks for advice.
Both should have the same function in term of usage with USD. Same strength same limitation.
You should open an My Account if you want to transact. You should treat Multiplier Account like a fixed deposit account. The idea behind Multiplier is to lock in people's money with DBS so that DBS can make use of the money. In return DBS gives a higher interest rates if their criteria are met.
I have both account. Salary, bills, paynow, nets, etc. are all transacted via My Account. My Multiplier is left untouched. Each month I move the interested earned back to My Account. I have max out my Multiplier limit based on the criteria that I can meet.
DBS does not make Multiplier any better than My Account (in term of transaction) because that is not their key intention. These are all my personal POV.