As Bitcoin (BTC) rises to near its historic high, some savvy investors are diversifying with promising cryptocurrencies and looking towards Rexas Finance (RXS), Tron (TRX), Avalanche (AVAX), and Polkadot (DOT), as they offer specific differentiating factors and innovations that could help propel them in the market. Due to exponential market dynamics, invest in altcoins before Bitcoin rises. Why should you add these four altcoins to your portfolio now?