Introduction: Decentralization Technologies in Finance -- Financial Regulation, Political Context, and Technology in the European Union -- Blockchain Technology -- Decentralized Digital Identities -- Federated Learning -- Privacy-Enhancing Technologies -- Self-Sovereign Identity for Digital KYC...

Purpose: This paper aims to elaborate on the optimization of two particular cryptocurrency portfolios in a mean-variance framework. In general, cryptocurrencies can be classified to as coins and tokens where the first can be thought of as a medium of exchange and the latter accounts for...