For a successful attack on SHA-256, only 2500 logical units are needed, while a number of major companies are aiming to reach a figure of 3000 in the next five years, the expert noted.

In his opinion, actions to protect Bitcoin from quantum threats need to be initiated now, as any changes to the protocol will take considerable time.

According to a post on the BitcoinTalk forum in June 2010, the creator of the first cryptocurrency, Satoshi Nakamoto, considered the threat from quantum computers at that time to be extremely unlikely. However, he suggested that in this case, the network could gradually transition to a more secure algorithm like SHA-512.