Blockchain security expert ZachXBT has announced he will no longer assist Dogecoin buyers, citing harassment and a lack of cooperation as reasons for his decision. In a tweet, ZachXBT expressed frustration with those who invest in "shitcoins" like Dogecoin, stating that they often fail to file police reports, respect his time, or make donations. This announcement comes after a string of high-profile Dogecoin-related scams, leaving many investors seeking assistance from security experts like ZachXBT. However, the expert's decision not to help these individuals has sparked discussion about the responsibility of investors to conduct thorough research before investing in cryptocurrency.