Both are achievable, depending on the set goal you already have for yourself. Although, personally, i would prefer long term, but my long term, might start from 6 months upward.
Ripple is one of the best coins in the crypto space. Just recently, it moved from 0.3 to 0.5, which shows significant growth in it. This coin is serious competing with ethereum and if care is not taken,  it might take the second place.