No, the existence of bitcoin is not a threat to national jobs and curreny, but bitcoin can be an additional income to make life better. Bitcoin is more likely to be used as an asset and used for investment, and that does't threaten the existence of a national currency.
I agree with you! Actualy bitcoin has helped them in ways! It can be an alternative way to earn money. Sometimes its better than your actual salary. Bitcoin is an ally ready to be harnessed, not a threat