In fact, ethereum cannot do anything in 2020 because when bitcoin has increased sharply which usually ethereum has also participated, at that time Ehereum could not get it to its full potential.
If it is going to rise then this year is the right year for ethereum to rise up. At the beginning, bitcoin was actually at a time when it was down and stable, then it's time for Ethereum to rise. it is proven that ATH has been formed but has not achieved the highest achievement and there will be renewable ATH again this year.
if in two years 2022 new ATH will be created of course I will wait for ETH prices to go down to buy again
why should you wait for renewable ATH again in 2022, this year ethereum initially made the ATH, but that ATH is not yet considered the maximum compared to the increase that bitcoin gets, precisely this year ethereum must get it again. thus making the spirit of other altcoins and bounties excited. So if you've got ethereum is the right time to hold on to it.
At the moment ETH is moving around its ATH so we can consider it in bullish zone than it sounds really strange why would anybody have to wait for 2 years to see the new ATH if this get close above $1.5k than it will be great achievement. But it is not a good to give anybody advise in public place whether everybody has own goal how long it can hodl.