Means I will have only until 2021. 
So the below is not going to happen then:
"Insider information from my friend working at HLB

Existing cardholder can still continue to spend with fortune card and enjoy cash back as per BAU

Request for card replacement

So when ur card going to expired and no new replacement sending over can request for card replacement and bank got no right to cancel ur card until u request to cancel.

This is what my friend told me"

applied essential supp and the CS call me back for verification.
i asked them whether they will send me renew Fortune cc and supp card before expiry date and she told me will send one month before expiry, if less than 2 weeks still didn't receive just call them.
so what my sis in law who work in hlb said is true, the fortune will continue for existing customer even though discontinued for new customer.