Singapore's Prime Minister Tharman Shanmugaratnam said the country's government will "not ban" cryptocurrency.
In Asia, Japan and Singapore are the best markets for cryptocurrency and blockchain in recent years. In China, Vietnam, Indonesia banned bitcoin and the cryptocurrency market, Singapore was very active in developing Blockchain and cryptocurrency markets.

At present, bitcoin prices are down at $ 6,644. This is a opportunity to buy bitcoin for long-term investors.
But still need to be careful as the downtrend remains. The reason for the bad market may be due to an increase in access bans for international trading sites in China and the number of banks prohibit credit card payments for cryptocurrency

Bitcoin is a global craze. Even farmers, students, the older, housewives ... who are don’t know what is blockchain also buy bitcoin. Because there are so many new investors investing in it in the hope of making a big profit. But actually that is not investing that is gambling.  
I do not prevent you investing to make money but invest wisely. Especially do not put all the property into bitcoin and cryptocurrency. Hope people do not blindly participate in this gamble.

 
I think NO, you shouldn’t. Because These sites can be categorized mostly as scams or HYIPs (high yield investment programs).
These sites take money from people around and promise to give them interest on them. They will then start off by paying these returns through money they get from new sign ups and create a big buzz around the site. Usually they will also have some sort of referral program so that users can bring in their friends. This will go on for around 3-4 months until one day the website will just go offline and the money will be gone.
I should you stay away from sites promise double your coins or give you daily interest on them.

As from January 1, 2018 the act of issuing, supplying and using illegal means of payment, including bitcoin and other similar virtual currencies can be prosecuted for criminal liability in Vietnam. Information to users of bitcoin in Vietnam note. 

is ethereum better than bitcoin? what do you thịnk about that? Which is the best Cryptocurrency to invest 2018?