1. Bitcoinponzitool 2018. https://github.com/bitcoinponzi/BitcoinPonziTool/.
2. On the economic significance of ransomware campaigns: A bitcoin transactions perspective (dataset), 2018. https://spritz.math.unipd.it/datasets/btcransomware/ knowledge_base.zip.
3. Ransomware in the bitcoin ecosystem | dataset extraction 2019. https://github. com/behas/ransomware-dataset.
4. Spams meet cryptocurrencies dataset 2019. https://github.com/MatteoRomiti/ Sextortion_Spam_Bitcoin.
5. Cryptocurrency exchange scams dataset 2020. https://cryptoexchangescam. github.io/ScamDataset/.