Bitcoin was accepted by Singapore because this country always support new technologies and implement in their country. People also support their government, that's why bitcoin is legalised in Singapore. Many ico's are also launched in this country successfully and many new projects are also developed. Singapore supports block chain technology and it is one of the payment method accepts in few shops.
I think all countries in Asia are also developing with technological progress. does anyone limit themselves to that? Let's think about China? we all know technology in this country is growing very fast.
but, to legalize or not ban cryptocurrency something different. there are regulations that must be regulated, and still do not interfere with existing financial regulations.