Question: What cryptocurrency does Erik Voorhees and BitInstant have in common?

Context paragraphs:
Burstcoin: Burstcoin is a digital cryptocurrency and payment system based on the blockchain technology.  Burstcoin was introduced on the bitcointalk.org forum on 10 August 2014 as an Nxt-based currency.  Burstcoins are mined using an algorithm called proof-of-capacity (PoC) in which miners use computer storage instead of the more common energy-expensive method proof-of-work (PoW) which involves permanent computational operations.

Erki: Erki is a common masculine given name in Estonia.  Its name day in Estonia is 18 May.  Related versions to Erki are "Erkki" (more common in Finland), "Eerik", "Erik", "Erich", "Eeri", "Eero", "Ergo", "Ergi", and "Erko" (all share the 18 May name day).  People with the name Erki include:

BitInstant: BitInstant was a bitcoin exchange start-up based in New York City.  Founded in 2011 by Gareth Nelson and Charlie Shrem, BitInstant provided a means to rapidly pay traditional funds to bitcoin exchanges.  As of January 2014, BitInstant's website is no longer available, displaying only a blank page.  Its blog was unavailable as of October 31, 2014.

Erik Menneskesøn: Erik Menneskesøn (meaning Erik "Son of Man") is a protagonist in the mythological series by the Danish writer Lars-Henrik Olsen.  The series exist in a parallel universe set in present time, the major difference is that the Norse Mythology is real.  Common of all the books are that the realm of Heaven(Asgard in this context), is the most used.  Whereas Earth is roughly mainly used as a dull starting place.

List of bitcoin companies: This is a list of for-profit companies with notable commercial activities related to bitcoins and Cryptocurrency.  Common services are wallet providers, bitcoin exchanges, payment service providers and venture capital.  Other services include mining pools, cloud mining, peer-to-peer lending, exchange-traded funds, over-the-counter trading, gambling, micropayments, affiliates and prediction markets.

Erik Voorhees: Erik Tristan Voorhees is an American / Panamanian startup founder.  He is co-founder of the bitcoin company Coinapult, worked as Director of Marketing at BitInstant, and was founder and partial owner of the bitcoin gambling website Satoshi Dice (subsequently sold in July 2013 to an undisclosed buyer).

Erikson: Erikson is a common Scandinavian patronymic surname meaning "son of Erik", itself an Old Norse given name.  There are other spelling variations of this surname, as it is common amongst Danes, Swedes, Finns, Norwegians, and Germans.  Erikson is uncommon as a given name.  People with the surname include:

Kraken: The kraken ( ) is a legendary sea monster of giant size that is said to dwell off the coasts of Norway and Greenland.  Authors over the years have postulated that the legend originated from sightings of giant squids that may grow to 12–15 meters (40–50 feet) in length.  The sheer size and fearsome appearance attributed to the kraken have made it a common ocean-dwelling monster in various fictional works.  It was first described by the Dane Erik Pontoppidan in 1752–3.

Blockchain.info: Blockchain.info is a bitcoin cryptocurrency wallet and block explorer service.  Launched in August 2011, the service provides data on recent transactions, mined blocks in the bitcoin blockchain, charts on the bitcoin economy, and statistics and resources for developers.  Information from and links to the website are common in media coverage and in bitcoin forums.  The Blockchain.info mobile app for Android allows users to securely send and receive bitcoins and browse blockchain information.  In December 2013, the company acquired ZeroBlock LLC, makers of the leading mobile bitcoin app.

Nordenskiöld Land: Nordenskiöld Land is the land area between Isfjorden and Van Mijenfjorden on Spitsbergen, Svalbard.  The area is named after Finnish-Swedish explorer and geologist Nils Adolf Erik Nordenskiöld.  The coastal region of Nordenskiöld Land (Nordenskiøldkysten) has been identified as an Important Bird Area (IBA) by BirdLife International because it supports breeding populations of barnacle geese and common eiders.

Supporting paragraphs: Erik Voorhees BitInstant
Answer: bitcoin