The fiat blockchain enables full reserve banking. The units on the block chain are fully backed by the reserves in the safes of fiat bankers. Of course, everything depends on the honesty of the fiat banker. However, the current situation in banking is much worse. The current-day, traditional fiat banker keeps only a fraction of its deposits, the rest is loaned. If only a fraction of these loans default, the bank defaults and the depositors will lose their money for as far as it is not insured.
About fractional reserve. Banks do overnight loans to each other to balance their books. If one one bank is runned they have to borrow from another bank. If they become insolvent they get bought out.
If all banks get runned they turn to the Fed as lender of last resort. Theres nothing wrong with fractional reserve.
The crisis we face now has more to do with how banking and finance became too advanced for current regulations. 2008 crisis has more to do w derivatives and shadow banking.
Bitcoins don't address any of this only regulations will. Its not about honest bankers. Its about how bankers and regulators play cat and mouse
I think the only interesting thing about bitcoin is the tech minus the amateur economics and libertarian/ anarchist politics. If anything the banks and govt will develop a crypto for transfering money / making payments digitally. Thats what consumers care about, not politics or speculating. Im not a tech so I don't know if its feasible or not