The price of Solana (SOL) has been underwhelming, resulting in fear among long-term holders.The on-chain indicator, Long-Term Holder Net Unrealized Profit/Loss (NUPL), suggests that now might be a good time for investors to buy the dip.The NUPL metric for SOL has slipped below the 0.25 mark, indicating reduced bearish pressure from long-term investors.Historically, entering the market during periods of fear has been a strategy of smart money investors.