Vitalik Buterin: @koeppelmann @sassal0x IMO 我们应该首先实现一些简单的基于链的 PoS，比如 peercoin 或 nxt，然后升级到异步安全。

原推：@koeppelmann @sassal0x IMO we should have first implemented some simple chain-based PoS like peercoin or nxt, and upgraded to asynchronous safety later.
https://twitter.com/VitalikButerin/status/1567933116899291136