Too Long; Didn't Read
Blockchain become one of the most interesting place for last few years. Of course, there are a lot of funds and many people wanna get it. There are three group of people in crypto-world now. Who create the projects, who invest into them and who hack them. First and third groups are most clever in this group, and in most cases third group is more clever. It happens because lot of projects built just for earning money. But this article will be about Hal Finney and Blockchain attack.