$2.1k is right around the corner. But I doubt ETH will be able to retain that price if Bitcoin is still in "bearish mode". I'd say, the current "pump" is only because of the PoS hype. Whales are making their moves in order to cash out from the upcoming upgrade. Even though ETH will change its consensus algorithm from PoW to PoS, there won't be any reduction in gas fees because the Blockchain itself still has a heavy network load.
Only scaling the main chain itself, would bring "tangible" benefits to end users. There are even talks about launching a POW fork of the ETH blockchain when we already have Ethereum Classic (ETC). It's all about money, so I wouldn't be surprised if ETH explodes after the upgrade only to go all the way down the drain a few days later. Just my thoughts