It is not that Nepali economy strong, but Nepali currency is pegged with Indian currency. Therefore, Nepali currency looks getting stronger. With widening trade gap with India and decreased remittance, devaluation of Nepali currency is long due. People may panic in short term but will be good in the long run.
Dollar might go up a little in a couple of days due to the housing fraud in Europe......it went up on Friday in the market ....I don't know how that's gonna fare with the nepali currency but I feel it will be worth the wait