As during the "Mississippi Bubble" in 1715–1720, too many assignats were put in circulation, exceeding the value of the "national properties", and the coins, due also to military requisitioning and hoarding, rarefied to pay foreign suppliers. With national government debt remaining unpaid, and a shortage of silver and brass to mint coins, confidence in the new currency declined, leading to hyperinflation, more food riots, severe political instability and termination of the First French Republic and the political fall of the French Convention. Then followed the economic failure of the Directoire: coins were still very rare. After a "coup d'état" that led to the Consulate, the First Consul progressively acquired sole legislative power at the expense of the other unstable and discredited consultative and legislative institutions.