80% of bitcoin is backed by Tether (USDT). There is only enough Tether to cover 60% of all bitcoin. Tether is heavily invested in Chinese bonds. The Chinese market is about to go into a recession thanks to their real estate market collapsing. Evergrande, the seventh largest real estate company in the world, has announced they are unable to pay back foreign investors. When tether collapses, you won't be able to sell your bitcoin. I've stayed away for this reason.