The price forecast for any cryptocurrency depends on a number of macroeconomic, news, financial, and regulatory factors. To predict the growth, you need to constantly monitor the key metrics of the coin, the development of the project, and related positive news.
Most cryptocurrencies are also subject to general market trends and grow when there is a bullish trend in a particular market segment. For example, the time of rapid growth of altcoins is called the alt season — during such periods there is a high probability that the price of many cryptocurrencies will go up.