Bielefeld. Corona apparently prevented many Bielefeld people from spending their money last year. At the Sparkasse alone, customer deposits rose by 500 million euros to 5.9 billion euros in 2020. Most of the money is in checking accounts and savings accounts. But those who hoard too much money have to pay for it. “Parking costs”, says Jennifer Erdmann, member of the board of the municipal institute. Interest There are negative interest rates nationwide at numerous banks, including the Sparkasse …