There is None as Stupid as the One Who Refuses to Learn.

From the BBC:
"[Former finance minister Alistair Darling] said banks today were much better capitalised than in 2007 and regulators "more sharp and ready to intervene".
But he warned the next crisis was likely to come from "somewhere unexpected and from causes that haven't yet been identified".
"The biggest danger is complacency. And of course in a few years' time when institutional memories start to fade, and the people around have all gone and retired, then that's where the risk occurs."
There's no mystery at all, financial crises are caused by leveraged land speculation (or speculating in some other monopoly right or natural resource).
Doesn't everybody know this?
We can argue about how reliable the 18-year cycle is, or draw up a short-ish list of things other than land which have been behind certain credit bubbles, but that's just details.
All this "regulation" won't make the slightest bit of difference, banks' own capital was so dwindlingly small last time, it doesn't matter whether they've doubled it or trebled it, it is still dwindlingly small.