Ether (ETH), the second largest cryptocurrency by market capitalization, returned to an all-time high on April 2 when the spot price for each unit of ETH exceeded $2,000. Meanwhile, the ominous spectre of Ethereum’s unwieldy transaction fees made itself felt once more, as the cost of using the blockchain rose 77% across the past few days, in line with a 31% increase to the ETH coin price.