The bond market is over 100 trillion. Why would people buy bonds returning low fixed interest rates in depreciating currencies if bitcoin with a fixed total su

The bond market is over 100 trillion. Why would people buy bonds returning low fixed interest rates in depreciating currencies if bitcoin with a fixed total supply becomes the global reserve currency? Gold is currently at a 10 trillion dollar market cap, and is a pretty small part of the global financial system at this point. The odds are absolutely not zero.