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# Crypto Currencies

The history and prospects of Bitcoin

The idea of a currency independent of central banks has inspired and motivated many developers for decades. But it wasn’t until 2009 that their dream would come true with the Bitcoin launch. This is an article on the history and prospects of Bitcoin in 3 parts.

Arbitrum vs Optimism: Comparing the two most important Layer-2-Solutions for Ethereum

Two of the most popular Layer 2 solutions for Ethereum are Optimism and Arbitrum. Both protocols have their pros and cons, and it’s important to understand how they differ from each other so that you choose the right technology for your use case. Therefore, let’s do a little comparison below.