Which is the best credit card in the market now if I'm looking for cashback?

It's hard to suggest without knowing which categories you usually spend on and the amount you spend a month.

But if you can hit at least $600 a month, you can consider the revamped OCBC Frank Card.

Cashback categories are
1. 6% cashback for online spend, capped at $25
2. 6% cashback for mobile payment or foreign spend, capped at $25
3. 0.3% on others, capped at $25

(1) and (2) cover almost all daily spend, from dining, groceries, phone bills, movie tickets, ecommerce purchases. Just make sure you use Google pay/Samsung pay/apple pay instead of just the card.