Market is so slow down now and so many project are dying because people afraid invest more money and hold old coins so I can't tell which coin will be long living in the future
it is better to take a more serious approach to the choice of your objects for investment. Undoubtedly, ethereum is the best choice, but since it is impossible to invest only in one direction, you better choose such a coin as Stellar and Neo. Although Bitcoin is also possible for short term investments.