How was inflation in the roman empire started?

Answer 1

The problem of hyperinflation of the Crisis of the Third Century was due to the Roman coins having been debased by subsequent emperors for nearly a century. Emperors reduced the precious metal content of the gold and silver coins to have more of them to finance their expenses. This devalued the currency. In the end there was only a 5% content of gold or silver and the coins became worthless and unusable for transactions and trade.