ETHE is the grayscale stock trust for ethereum.
ETHE has been frozen since Friday afternoon when the stock market last closed. At that time, ETH was trading at around $510. Currently, ETH is pushing over $590. Simple logic tells us that when the stock market opens Monday morning (in about 5 hours) ETHE will likely catapult upward to compensate for the movement of ETH/USD over the weekend.
TLDR: Expect a 10%+ Jump in ETHE Stock value right as the market opens on Monday, as the trust fund shares catch up to underlying asset appreciate over the weekend.