As blockchain is constantly being reviewed by bitcoin users, hacks are unlikely. On the other hand, however, the fact that bitcoin itself is difficult to hack does not mean that it's necessarily a safe investment. There does exist the potential for security risks at various stages of the trading process.

Has blockchain ever been hacked?

Hackers have stolen some $600m (£433m) in what appears to be one the largest cryptocurrency heists ever. Blockchain site Poly Network said hackers had exploited a vulnerability in its system and taken thousands of digital tokens such as Ether.

Is blockchain still safe?

Blockchain technology is secure as it is decentralised and distributed. There is no single point of failure, which makes it much harder to corrupt. Hacking into one part of the system cannot affect other parts. ... This restricts users from making changes to the ledger.