I'm from Malaysia,and I brought 8000btc when many years ago(and glad that I still have found back).
It's not joking right? Let me us know your address were funded 8000BTC. if you able to given a proof by sign message so congrats, you're one the most lucky on this planet.
There is many way yo make your money be fiat money. I just trying with keywords " Exchanges in malaysia, so i got refference :
https://www.buybitcoinworldwide.com/malaysia/ " I see a popular exchanges those listed. did you trying? You can do for daily withdrawal for max limit.
Why must he need to give that address?who are you for him to be obliged?
OP if youre really have that big bitcoin amount in your wallet,better move to singapore or other asian country like Philippines so you can withdraw that amount and live your life to the fullest.
Anyway congratulations
So you can cash out 5 Billion in PHP in a third world country? Was this done before?