Eth2 is 6 years to late. There was a time staking was all the rave, junk coins now where are they now?
The first ever, Peercoin a total failure even dev left, tells all
Peercoin had two weaknesses that Eth2 does not.
1) Nothing at Stake resistance. Eth2's "weak subjectivity" assumption isn't the dealbreaker that PoW partisans tend to see it as IMO. In particular, it's not clear that BTC
doesn't have weak subjectivity, thanks to the influence of exchanges on "deciding" which chain is exchangeable for money in the event of a deep enough reorg. Meanwhile, Peercoin devs (AFAICT) dismissed N@S as a "purely theoretical attack" and refused to take any effort defending against it.
2) Peercoin's sole interesting feature was PoS; Ethereum has a bunch of other features which make it interesting even without it getting the scalability benefits of sharded Casper FFG.