Yes, Taiwan has declared Bitcoin to be illegal in the country. The announcement came after a recent high-profile incident wherein a prominent Hong Kong business tycoon was kidnapped by a criminal gang who demanded HK$70 million (approx. 30,000 BTC or over USD $ 10 million) in Bitcoin. The victim was rescued soon after a payment of HK$13 million (approx. 4,800 BTC or USD $1.6 million).

Source: https://www.ccn.com/bitcoin-declared-illegal-in-taiwan/