Of course yes, once you believed in the coins you invested that means in the future you knew to yourself that it will give
you a nice profit or savings. Just make sure that the coins you choose to hold in the long term or short term has a real
potential to increase in the future, or you did a research in it before deciding to buy em.
The best coins are always in a good trend and at a good rating so the volume is also very good, so there is no need to do too much research on coins that are already popular or well known, because they are all definitely good to keep in the long run, except for new coins whose potential is still a question mark.