Trading is the best to increase your assets in altcoins.
Do you see that altcoin market continously falling? So ehy you didn't sell altcoins at the beginning and buying them again when they hit the bottom.
Trading them as I've said but for someone who's not really into it will find it hard to gain profits. Knowing that the market continuous to fall, I don't advise to sell and buy it when it hits the bottom. Much better to keep it and buy with your extra money.