#PI Some Pi players reported that after participating in the "giving Pi" or "buying Pi at a high price" activities on social media, their Wallet Secret Key was stolen. "After entering the 24-character Wallet password, all the nearly 2000 Pi in my Wallet were lost," said Mr. Huang, 60, who has been participating in the Pi Network since 2020. Mr. Hai said that he didn't know how to trade Pi, but after his son's guidance, he saved the Wallet Secret Key to "check Pi when needed". Last week, he saw someone giving away Pi on social media. After clicking the link, he entered the Wallet Secret Key as instructed, and all the Pi disappeared. 56-year-old Zhang Hua almost fell into the trap of buying Pi at a high price. She saw someone willing to buy Pi for $100 on the Social Web, instead of $2 per coin on some exchanges, and contacted to sell half of her Pi. "They sent me a link via SMS and instructed me how to transfer Pi, and even suggested a video call. Suspecting fraud, I didn't follow it," said Ms. Hua. According to Duy Anh, the administrator of the Pi Network Facebook group with 160,000 members, fraudulent activities to steal Pi Wallet have occurred since the project is still in the "mainnet closed" stage, which means that players can only trade internally. "But when Pi opened the network on February 20 and can trade externally, the frequency of fraud is increasing sharply. Dozens of related content are shared in the group every day, and I only review typical cases," the person said. The administrator stated that in the past, the common practice was for scammers to post that they were willing to buy Pi at a high price, and then use a small deposit as bait to persuade the seller to transfer all their Pi to them. "But recently, they are more 'investing', posting ads giving away Pi on Social Web such as X, Facebook, or Google Ads to expand the possibility of reaching the target," commented Duy Anh. "To be convincing, they engage in false interactions, as if many people have received the gifted Pi." He said that scammers usually target older people, those with less knowledge of technology and digital money, and those who are greedy for free digital money. According to Vo Do Thang, director of the Athena Network Security and Management Training Center, the common way to steal online accounts, especially digital Wallets, is to send files or links containing malware, or create websites that look exactly like the official website to lure victims into entering important information. By following the instructions, they can "personally" install malicious code and "sacrifice" the account to hackers. "When the device is invaded, the malware will take measures to take over the account and take away the money that the user can't do anything about," Mr. Thắng said. "The best way to protect yourself is to not follow the instructions of strangers, be suspicious of all unfamiliar links, and limit clicking on links of unknown origin." Pi Network was established in 2019, and participants can obtain Pi Cryptocurrency for free through advertisements, by using the mobile app to "tap the lightning" every day. Vietnam is one of the markets participating in "Mining Pi". The project has caused controversy because it took nearly six years to "open the network", allowing users to transfer Pi to other platforms for trading, starting from February 20.