Already now we can observe periodic good growth of promising altcoins and many of them have grown quite well in price. Therefore, I do not see any obstacles for the further price growth of altcoins. However, this market is becoming more mature and unlike the 2017 altcoin season, when almost all altcoins were growing in value, only potential altcoins will grow this year. Apparently, this will happen when bitcoin reaches a certain peak in its price and, after a correction, will temporarily gain a foothold in its price position.