In fact, I can't think of a better choice than Bitcoin. All PoS blockchains I know of are fundamentally broken in at least one way (however that might change with [1]), Bitcoin is good enough for payments, and the alternatives that support smart contracts usually utilise a broken ledger model (account model [2]).
The remaining blockchains are very niche, hence there isn't any viable alternative to Bitcoin AFAICT.
Disclaimer: I work with Cardano
[0] https://en.wikipedia.org/wiki/Lightning_Network
[1] https://eprint.iacr.org/2022/1448
[2} https://iohk.io/en/research/library/papers/chimeric-ledgers-..., https://iohk.io/en/research/library/papers/utxo-vs-account-b..., if you want to know about the differences
Two of the most important (IMO) however, are:
1. Small blocksize permits anyone to run a full validating Bitcoin node with minimal consumer hardware (including a Raspberry Pi).
2. As the block subsidy decreases, fees will become more and more important component of miner revenue; gigantic (or taken to the logical absurd, unbounded) block size means no fee market will emerge.
Also, it seems to me that we should be settling to a BTC/BCH price that is at least loosely coupled to the energy costs of mining, no?