in a major collapse money has no value - so there's that
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a big 'depression era' collapse means the money stays in the bank - no one can take out a loan. the bank benefits by being able to stay in business even with all the write downs.
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Trump probably doesn't want a gold standard. (my opinion) he does a lot of his work by leveraging loans and investors capital - it isn't easy to do that kind of business in a world that uses money rather than e-currency.