I'm from Indonesia, very rarely do I found bitcoin group in Whatssap.
Singapore are one of country which accepting bitcoin transaction in country, here local discussion https://bitcointalk.org/index.php?topic=214887.0 from singapore regions. I will advise you to joining some of group in telegram, there some active group whom discussing about bitcoin and info's crypto. It's public group from many country open, but open discussing about many thing, investment plans, mining and others related.