Altcoins popping up like in a game "whack a mole". Some did 50%, some did 5x. Is there any methods that could be used to predict which altcoin will be next? (I guess there must be some indicators, narrative and etc.) or it is purely random game?
Why are you asking that OP? Are you too lazy to research potential altcoins? There are so many altcoins emerging in this era; even meme coins that suddenly make it to the top listings on well-known exchanges are making the news. Don't you know that OP?
There are also so many ways to identify and know which are the newly risen field industries of the crypto space that we are now part of here. There are platforms for you to choose from,
such as coinmarketcap, coingecko, and others such as defillama and geckoterminal.