In July 2017, the Ethereum wallet Parity was stolen. Hackers exploited its multi-signature vulnerability and stole 150,000 Ethereum. In November 2017, the Parity wallet had a bug again, and Ethereum assets worth hundreds of millions of dollars were frozen.
In January 2018, hackers transferred $400,000 worth of cryptocurrency from the BlackWallet wallet through a phishing website.
In April 2018, Myetherwallet (MEW) suffered a DNS hijacking attack by hackers, causing a user to lose more than 85 ETH, worth nearly US$60,000.
Similar thefts are happening all the time. If you lose your wallet, you still have a chance to get it back. But once your digital wallet is stolen, the chances of getting it back are slim. Blockchain is decentralized, and we can only find out which account our stolen digital currency was transferred to, but we cannot know the true identity of the stolen account. So the uncle is powerless.