Billionaire Donald Trump says the U.S. economy is poised for “massive inflation” and is warning investors to take steps now to protect themselves.In the gripping CNBC interview, Trump also told investors they should not trust official government statistics.He even questioned the “official unemployment” numbers. “It’s over 20 percent. It’s not 8.3 percent,” Trump said. Trump also thinks skyrocketing oil prices will cripple the U.S. economy. “Right now, [oil] is at an all-time record for this time of the year, in the summer they predict $5 gasoline, maybe $6.”But Trump isn’t the only expert warning the U.S. economy may go off the cliff. Robert Wiedemer, author of the New York Times best-selling book Aftershock, stated in a recent interview, “The data is clear, 50% unemployment, a 90% stock market drop, and 100% annual inflation . . . starting in 2012.”Read more: Massive Inflation Coming, Warns Donald Trump