Former President Donald Trump’s Truth Social platform went public this week (trading as “DJT” on the Nasdaq Composite), and its initial public offering (IPO) is likely to deliver a $3 billion windfall to the ex-president with it currently trading at roughly $70 per share. But one ethics expert argues that the overvalued stock could also prove harmful beyond just the stock market. This isn’t the first time Trump has tried to take one of his companies public. In the 1990s, his company Trump Hotel and Casino Resorts was publicly traded. And while Trump himself reaped the benefits of that IPO, inv…