Most financial assets gradually appreciate, but borrowing to buy financial assets is a good way to eventually go bankrupt. Maybe a better rule: borrow so your

Most financial assets gradually appreciate, but borrowing to buy financial assets is a good way to eventually go bankrupt. Maybe a better rule: borrow so your consumption fluctuates less than your income, but always save twice what you think you should and borrow half what you think you can, to account for how stupidly optimistic people are in the presence of easy money and compound interest.