At least there will be one country whose currency is dead, possibly Argentina or Venezuela. This will make the adopters of bitcoin increase greatly, which will trigger an increase in the value of bitcoin to more than USD 50 thousand when that happens.

The mainstream bank will accept bitcoin, and start offering bitcoin storage facilities. They will also make digital currency derivatives.

95% of digital currencies other than bitcoin will disappear, just as when the dotcom site is booming. On the other hand, digital currencies that still survive their exchange rates will increase dramatically. This will occur in the next four to six months.

The US government will quietly begin to accumulate one small digital currency to facilitate transactions in gray areas with other countries. This has actually begun to happen, but it will only be big in 2018.

China will invest heavily in digital currency, although most likely not bitcoin. The Chinese government will want to have a digital currency that is competitive with bitcoin. The conditions for the digital currency they must control.

The main problem in digital currencies is volatility, and this is predicted to decline dramatically in 2018.

The more companies will pay for their freelancers using digital currency, which will trigger tax reform.

Digital currency will change the currency monopoly by the government of a country, just as the internet changes monopolistic practices in the telephone industry.

There will be a new government agency created to analyze digital currency regulations.

Thousands of digital currency companies will be created and will go public, but only a few can succeed.