Experts from Kaspersky Lab noted that Lazarus attackers go on to hack firms which operate in the fields of digital currencies and fintech.
The text does not talk about cryptocurrencies. I do not know from where that word was entered with digital currencies, their goal is not cryptos itself but hacking.
Also, reporting the losses of the platforms are not all the result of hacks some of them, manipulation of prices and much to steal investors' money.
Based on Wikipedia this group is not from North Korea.
Lazarus Group (also known as HIDDEN COBRA)[1] is a cybercrime group made up of an unknown number of individuals. While not much is known about the Lazarus Group,
Lazarus and North Korean hackers were blamed for the attacks