Coldware ($COLD), Cardano ($ADA), Filecoin ($FIL), and Kaspa ($KAS) are highlighted as promising cryptocurrencies below $3.Coldware focuses on making crypto accessible with its own blockchain and specialized devices for easy use.Cardano ($ADA) breaks key resistance levels, showing bullish sentiment and increased network activity.Filecoin ($FIL) partners with Lockheed Martin for space testing, demonstrating practical use beyond blockchain technology; while Kaspa ($KAS) gains attention for its innovative approach to transaction confirmation.