Digital currencies are not a major risk now for the fiat monetary standards in light of the fact that lone less individuals who thinks about cryptos and even them utilizes crypto as a benefit not a money so if that proceeds everlastingly there is no enormous danger for the fiat monetary standards since we require fiat to cashout the cryptos. In any case, when the general population begins to utilize crypto as immediate installment most likely it will supplant the fiat in huge part yet not totally.
That is the point. This is not going to last forever. Digital currencies especially bitcoin is grabbing fame on daily basis. More people are talking about this. Governments are also now paying close attention to bitcoin and altcoins because these now impose great threat to their control. With time, new things replace old ones. Paper money took place of gold years ago and now same is going to happen with it.