Although it might not be, I am 100% certain this is a scam. If you live in malaysia then you must know how to trade your bitcoin as you bought it in the first place, and there were no exchanges available in malaysia in the early stages of bitcoin. There is no way you were able to purchase 8000 btc back then and not know what to do with it. Secondly there are only a few adresses on the Bitcoin rich list with around 8000 btc on them and all of them have withdrawn btc in the last two years, now it is possible that you held bitcoin in different wallets but it is unlikely and it would further establish my point of how well you know the system.