Is the Bitcoin Network secure?
The Bitcoin Network is spread across the globe, with more users joining all the time. As Bitcoin grows in popularity, the growing size of the network makes it increasingly difficult to be hacked.
Theoretically, it is possible, but a hacker would have to launch what is known as a 51% attack, i.e. accessing 51% or more of the computers governing the network. A hacker would also have to undertake this feat within a 10-minute timeframe before the system updates with a new transactional data set.