Currently the developments in the altcoin I think are the most significant are ripple and stellar, these two coins are being adapted by many parties, the potential for more profits at the end of the year or early next year
Yes these coins will play a vital role in many a huge money for the investors in the future if they will hold them for a few years. Along with that if they have some other money then they have to invest also in other top 50 coins. In this way they will diversify their investment to secure from any lose.