cointelegraph.com
https://de.cointelegraph.com/news/bitcoin-network-difficulty-reaches-all-time-high-as-miners-pursue-2m-btc
Bitcoin (BTC), Blockchain.com, Mining Hashratensteigerung, Mining-Difficulty / Schwierigkeitsgrad, Mining-Hashrate, Studie / Bericht / Umfrage / Statistik