According to Cas Abbé, altcoins $GALA, $MATIC, and $SHIB experienced significant price increases in 2021, with $GALA pumping 100x, $MATIC 200x, and $SHIB 300x. This historical data is crucial for traders analyzing past market trends to predict future performance, although Cas Abbé does not specify which altcoins might perform similarly in 2025.