This document provides background information on cryptocurrencies and blockchain technology. It discusses cryptocurrencies like Bitcoin and Ethereum, initial coin offerings, how to obtain cryptocurrencies, and price fluctuations. It also explains blockchain technology including how transactions are processed and validated through hashing, digital signatures, and proof of work. Potential applications or "killer apps" of blockchain technology discussed include payments, registries, supply chain management, and digital identities. The document concludes with information on blockchain initiatives in Austria.