Ethereum recently spiked to $4,000, its highest level in three years, instilling confidence in its future performance.Market expert predicts Ethereum is just one leg away from reclaiming its all-time high and entering a new stage of price discovery.Positive on-chain metrics and growing interest in cryptocurrencies could attract new investors and drive ETH's upward movement.Although Ethereum's price turned bearish and fell to $3,800, investor confidence remains high with increased trading volume.