We DO know that had the gubmit taken over the bankrupt banks, rather than bailing them out, we would in 2017 have NO too-big-to-fail banks instead of twice as large and twice as hazardous too-big-to-fail banks that have found new profit centers in bailouts. Since 2008 companies other industries are working toward becoming too-big-to-fail so they can hop on the bailout gravy train.
The 1976 creation of Conrail whereby POTUS Ford and Congress took over bankrupt northeast railroads, reorganized them as Conrail, turned Conrail into a profitable, publicly traded corporation and sold it back to the private sector (CSX and NS railroads). Railroading is inherently a far more complex industry than banking, so taking over banks would have been a whole lot easier.
Banking only became complex when New Deal regulations were lifted and the banksters could turn banking into a shell game, to the extent that many Murkins actually believe the "paid back with interest" fake news.
Trump didn't invent fake news and alternative facts, he just took them to a previously unseen order of magnitude.