well, eth only needs a 30% increase to reach the $4k price tag. I recommend buying and holding eth because the price of eth can still go higher. After upgrading to eth2.0 I believe the price of eth will reach the new ATH.
The plan is still under development. Of course in the future when everything is done and ready to be operational I'm sure there will be a big boom in the ethereum market.
The community has waited long enough. and this progress is getting support from many people by staking ethereum. $4k I believe can be achieved.