Ransomware has cornered victims into paying $144 million in Bitcoin since 2013
Source: https://cointelegraph.com/news/ransomware-hacks-cost-victims-144m-in-btc-over-last-6-years-fbi-says
Ransomware Hacks Cost Victims $144M in BTC Over Last 6 Years, FBI Says
February 26, 2020
CoinTelegraph