Just FYI, at the moment although there is a way to deposit with btc but unfortunately there is no option for you to withdraw in BTC. You can do it with bank transfer or if you prefer crytpo then you can withdraw with USDT (TRC20). As explained as ryzaadit above, you may withdraw big amount as long as you are higher level VIP account (Platinum at least). To be Platinum VIP, your total deposit within a month should be at least 600M IDR or around 2BTC.