>"To deliver a peer-to-peer alternative to cash that, through decentralization, did away with the need for trust in financial institutions, which the 2008 crisis showed to be unscrupulous, and often corrupt." The sort of activity which led to the financial crisis would not be mitigated by the establishment of a decentralized currency. Decentralization would not do away with the need for financial institutions (or the…
It actually would deal with the issue that led to the GFC.
Remember --- the problem wasn't that there were fraudulent mortgages -- it is that these mortgages were packaged and repackaged in ways that deliberately obscured the risk involved so that people were buying stuff that had no underlying value. The lack of transparency is what encouraged the fraud and created the incentives for it, which is why the behaviour only stopped when there was a 65% fall in the value of pretty much all mortgage-backed-securities.
A mortgage CDO built on something like Ethereum would be programmatically transparent and anyone could look in real-time to see the value of their tranche. It would be trivial to distinguish between good and bad investments. And while there's still the potential for people to purchase things that do not have value, it becomes pretty much impossible for 2008 to happen again in a financial system run on crypto fintech -- intermediaries in the financial system would simply not be able to deliberately obscure transparency into which assets were owned and covered by which securities: if you wanted to check repayment rates you could script something to do the work in real-time by simply monitoring the blockchain.