Buying altcoins when the rate is low and growth is confirmed, its the best time to buy them. As said, many altcoins' values are growing up. This indicates the growth of crypto currency more than fiat in the current market. The new ICO's projects are the main reason for such growths. Wish for more innovations such.
i can see the marketcap of each cryptocurrency has a large enough volume, yeah it proves that business and trade cryptocurrency skyrocketed but that does not mean it will make you a definite profit in trading or investment altcoin, it takes a certain strategy, maybe when the price is low and has a large volume on that marketcap it is the right time to buy one coin