There are China, Russia, and South korea to ban Bitcoin exchanges. However, there are also other countries who are putting their foot ahead on Bitcoin, US, Switzerland, Aussie, and now IRAN. https://news.bitcoin.com/iranian-government-bitcoin-use/

That is why the Bitcoin value is not really turning down the slope as there are countries who appreciate the potentials of Bitcoin. If you are skeptic about Bitcoin, then dont invest on it. Investing on Bitcoin needs a lot discipline to control your emotions as value is not always high. BTC market is very volatile.