According to the official website of the DPRK, the Pyongyang Blockchain and Cryptocurrency Conference is set for 18 to 25 April 2019, when, as the site indicates:
“International experts in the blockchain and crypto industry will gather for the first time in Pyongyang to share their knowledge and vision, establish connections and discuss business opportunities.”
The conference will be open to the international community with a few exceptions, notably South Korean nationals and those from Japan and Israel. The event will last 8 days and lectures will be given at North Korea’s Science and Technology Complex.
The FAQ section says that the DPRK is the safest nation on earth. If you maintain basic common sense and show respect for the beliefs and culture of the nations, it is safe.
In North Korea, there is no roaming service. However, you can buy a SIM card that is used to make and receive international calls. However, for such a short stay, it is not necessary. You can simply use the communications room inside the hotel. This is used to make international calls.
Internet access is offered at $5 per hour.
The entrance fee is 3300 euros per person and includes flights China – North Korea – China, accommodation, transportation, and food. The event will begin on April 18, 2019, and end on April 25, 2019. But, be careful: No journalists or distribution of “any mass printed propaganda or digital/printed material against the dignity of the Republic” is permitted.