The key strength of blockchain technology and bitcoin in particular is a distributed registry. In blockchain technology, data is stored not on a central server, but in a huge network of computers that constantly checks the accuracy of records. This greatly complicates hacking: a hacker will have to hack a huge number of servers to change the information. Thus, in order to be able to fully control the blockchain, a person needs to gain access to all servers or nodes at the same time, which in itself is quite problematic. To capture the bitcoin blockchain, you will need to hack 150 thousand. servers at the same time. Since bitcoin appeared in 2009, the network has not been hacked yet. There have been cases of hacking exchanges or wallets, but not the entire network. At the same time, there are potential security risks at various stages of the bitcoin trading process. Bitcoins are stored in wallets and sold through digital currency exchanges. Thus, it is not difficult for users to gain access to other people's wallets and steal their coins. However, technology does not stand still, Google's developments in the field of quantum programming may pose a threat to the crypto industry. It is believed that the computing power of quantum supercomputers will be enough to crack the algorithms underlying the cryptocurrency.