If one has patience and little money, then they can invest in best coins only and sit holding it. It will help you get a good return in future and for those in between if rise comes and want to book profits can also do it and can make some profits on it. But investing in coins which does not have good future or doing panic selling etc may lead to losses and will not be able to earn money. Trading would recommend only those who have some knowledge on it and ready to take risk as market at times are highly volatile.