Earlier quoted context omitted.
I guess you could say that goldsmiths pretending they have more gold than they really do is kinda similar to cryptocurrency exchanges doing the same.
However-- for Bitcoin and essentially no other valuable asset before it, it's perfectly reasonable for an exchange to continuously prove that every bitcoin in your account is uniquely backed by coins that they control. No major exchange bothers to do it right now because the market doesn't demand it and any exchange that did would hurt themselves by causing their customers to care about the risk of insolvency. If you…
If I can't verify how much credit they've extended, then even knowing how much assets they have, I can't tell how leveraged they really are.