How to sell btc to myr in this forum.?
BitcoinTalk is not a trading platform so you are not buying/selling from this forum. It is a place to discuss about BTC and some Altcoins.
Besides, this forum is the best place to meet new people related to cryptos, so it offers you a trust system to reduce scam from others.
You should not trust anyone in this forum or give your personal information.
There are some people trusted by the forum, but that does not mean that you trust them or send money to them.