While Ethereum (ETH) retests a key level for the first time this month, some market watchers have advised caution, warning that the start of a new bull run may not be here yet. Related Reading: XRP Leads Crypto Funds $224M Rebound With Largest Weekly Inflows Since December No Ethereum Party Until This happens After jumping nearly 10%, Ethereum is attempting to reclaim a crucial area that has served as a major resistance zone since the early February crash. Over the past two months, the King of Altcoins has been trading sideways, hovering between the $1,800-$2,200 levels. As the altcoin breaks past the $2,150-$2,200 area, some market observers cautioned investors not to celebrate yet, arguing that ETH has failed to hold this level despite multiple retests during this period