Debt in the banking system is the thing that exists.
Show me debt, and I'll send you a pic with my bitcoins.
But, even if you don't believe us, even though we should have convinced you by now, what about the rest of the world? There are unbelievably smarter people than me and you who are astonished by the way it works and fight tooth and nail to accomplish usage in a global scale. Doesn't it seem extravagant to you to say that
every single one of the millions of Bitcoin users is a psycho?
The whole banking system exists to manage loans. Loans are debt. Every loan granted is evidence of debt. Every loan repayment is evidence of debt settlement. Numbers on bank accounts or banknotes just quantity the shares in that debt. What you can show me is a pic of fake number attached to your address. Nothing else.