As you may know, after a while Stockholms Banco began issuing more banknotes than they had cover for in precious metals. After a while, distrust of Stockholms Banco began to spread and people wanted to redeem their banknotes for precious metals. We now had Sweden's first bank run, which one might say was Sweden's first financial crisis. Stockholms Banco was taken over by the Riksdag (Swedish parliament) and later became the Riksbank. It must be said that the banknotes were very popular and highly-valued as long as people trusted in their worth. Compared with coins, they weighed very little and could easily be carried around. They were also considered to be worth more than the corresponding amount in coins. It was not until 1904 that the Riksbank was given a monopoly on issuing banknotes. Prior to this some commercial banks issued their own banknotes. The banknote monopoly meant two things. Firstly, it resolved the trust problem. Unlike commercial banks, a central bank like the Riksbank cannot normally go bankrupt. The holder of a banknote issued by the Riksbank can always be certain that it has a worth corresponding to its nominal value. Secondly, the banknote monopoly established a unique payment standard that is set by the state; in Sweden the legal tender is banknotes and coins issued by the Riksbank. The use of having a uniform standard for payments, and having this standard accepted by all, saves time and energy for individuals to expend on other things.
These advocates say that this would make it easier for the central bank to implement an efficient monetary policy with a negative interest rate. 10 This reasoning is based on the central bank being prevented from setting a negative interest rate to the extent considered necessary to stimulate economic activity. Personally, I am not convinced that this problem would arise in Sweden and I would once again like to say that the Riksbank has a statutory requirement to issue banknotes and coins. I see e-krona primarily as a complement to cash. 10 The idea is as follows. If the central bank introduces a negative interest rate, economic agents will choose to  hold cash, which does not have an interest rate, instead of deposits with the banks. This means that the central bank's policy loses impact at the level where the agents begin to prefer cash. This is often referred to in academic research as the “zero lower bound” problem. 8 [10]  The issuing of e-krona together with a positive interest rate on e-krona could affect financial stability in the banking sector. Today, the banking sector functions as a system of communicating vessels. If a consumer or a company withdraws money from a bank, this money comes into another bank, either as a deposit or as payment for a product or service.