Amazon voucher is the closest thing to “cash” — least restriction; no expiry.

— SQ Krisflyer?

— @BofA

• expiry probably 5 years after the transaction
• best “value” is cash .. $0.01 for each point but minimum 25,000 points :(. Better wait to accumulate.
• 2nd best: $0.008 for each point, minimum 10,000 points

— @cathay pacific CX AsiaMiles:

• The mileage expires too soon, like 4Y ??
  
• https://www.asiamiles.com/en/redeem-awards/flight-awards.html
• https://redeem.asiamiles.com/default/sales/order/history/ and https://www.asiamiles.com/en/account/transactions.html both show the redemption history
• Best redemption is Amazon voucher USD 50 / 9800 mi. Never expires so we can warehouse the points forever.
  
• Best value in Singapore is Giant gift card SGD 30 / 5800 mi. 6M validity
• The capitalVoucher might be a more pleasant surprise for wife, more presentable… usable at
  • Junction8
  • BugisJunction
  • PlazaSing
  • ION
  • RafflesCity