In 2007 the financial crises began because properties was buyed by money wich nobody has. This mean that manny people in the USA take credits at banks wich they couldn´t repay. The financial crisis is known under housing crisis,too, because most of the borrowers buyed a house from they´re credits. Following to these things the most americans have more than one bank card, so they can take more than one credit at one bank.
Because these things in the whole world a crisis is taking over and manny people have now less money. After the crisis take public politicans do help packs of money for the banks wich only have credits and no real money.