Recent data reveals that futures-based exchange-traded funds (ETFs) for Solana (SOL) and Ripple (XRP) have exceeded $1 billion in capital inflows. This significant surge signals a growing interest from both institutional and retail investors. The anticipation surrounding the eventual approval of spot ETFs adds further fuel to this excitement. Why are futures-based ETFs popular? These funds allow investors to participate in price fluctuations without physically owning the underlying assets, resulting in a rapid influx of funds. Analysts believe these surges could accelerate regulatory decisions regarding spot ETFs, potentially widening investment options for cryptocurrencies.