The advice “buyer beware” should rule the day when Donald Trump’s Truth Social, whichhas never shown a penny of profit, starts trading publicly, financial writer Adam Lashinsky argued Monday. Lashinsky issued this warning in the Washington Post one day before the former president’s media company is slated to begin trading under the ticker name “DJT” on the Nasdaq Stock Market. The former executive editor for Fortune admitted he is not one to normally give investment advice, but argued the securities filing from the former president’s Trump Media & Technology Group has enough red flags in it to…