[quonn]

If I take 80 Dollars from you and promise to return you 50, is this operation also worth 50 Dollars? If so, what‘s the meaning of „worth“?

If I open a bank account and someone else deposits 1 billion there and I have a contract that obliges me to return the money in a year and I am not allowed to move it or use it as a security, is my bank account or the bank creating it „worth“ 1 billion?

Whether bitcoin is worth something as a tool/currency cannot be measured well by the amount of money stored in it.