I think beside holding altcoin, you should try to do your own research and investing in ICO, that would be better and can earn a lot of money because ICO success will pump x3 x4 in the first stage, but you also have to be ready to pay the price because nowadays there so so many scam ICO, but I would recomend you take a look on Merculet, which I am investing in next month. Holding altcoin also have it's risk because the there is no ensurance that pthe price will pump in your marry day!