Speaking in general terms, it is safe to travel in Nepal. However, sudden strikes or protests are not uncommon. Hence, tourists are advised to remain updated with the local news. In case of any such strikes or protests, tourists should avoid traveling on that day. Still, in case of emergencies, they can go on buses (or travel) arranged by the government.
All the visitors should have valid travel insurance for any kind of theft, accident, or natural disaster. Tourists should keep an open eye for scams like vendors trying to sell goods for an inflated price and other credit-card scams.