when crypto market is rising then the best time to buy altcoin.. not only altcoin but also you can buy many coin. I think,, in present time is right time to buy altcoin. Because now crypto market is dump. ethereum price is low. so you can buy lot of coin.. and you can hold it. I think,, when the Market rise up, you back return huge profit.
However, keep in mind that not all altcoins are good and profitable because not all altcoins will experience pumping when it's bullish, only coins that have a good team and community will experience pump when the bullish trend occurs and bad coins will still be bad coins