In recent years, we have witnessed a growing number of new-wave DAG-based cryptocurrencies. It started (most likely) with DAGCoin¹ in 2015, which was followed by many other projects, such as IOTA, Byteball, Hashgraph, Chainspace, PARSEC, Fantom, and, of course, Aleph. In this article, we will first share our view of why DAGs are receiving increased attention