Historical price action of ETH suggests that it can reach the levels of >$4000 which is the all time high prices just like it did with its previous ATH of >$1000 prices in 2017. The same can be also said for Cardano (ADA).
It is clear that all other cryptos have reached or rose past their ATH prices of 2017 and most of them have maintained this price for months. But to get in now would not be wise to as you can see that from the ATH prices, which is why I warned to avoid jumping in at >$60K for BTC [0]. Now it has lost nearly half its value and has gone back to the prices since late January.
I expect another further pull back soon and we will be in the same cycle of people yelling 'cryptocurrency is dead xyz' and later in the months or years to come having repeated grumbling about how they missed out on the lows like they did in March 2020 and are celebrating that they have FOMO'd into February 2021's crypto euphoria.
Accumulation in the lows when the hype is over and taking profits in times of euphoria is the idea here.
As for stock (which is something completely different) to get into, probably $COIN or $ABNB.
Had some alts that I was up 3-4x on, should've at least put those back to the steady eth/btc.
I would put that $20k into Ethereum (2.0) or any other crypto that is scalable, sustainable and has a large DeFi ecosystem around it.