"To print the currency" means to produce physical money, such as bills or coins, that is used as a means of exchange within a country's economy. Full definition
The difference between printing currency and mining is that you have to ability to print money on demand, while mining is limited to whatever is available to extract at a given time. (money.stackexchange.com)
One attraction is that, in contrast to limitless printed currencies, there can never be more than 21 million bitcoins. (dailybitcoinnews.com)
It's no small task: Masiyiwa essentially wants to replace printed currency with digital money, transforming his native country into Africa's first paperless economy. (fortune.com)