The upgrade to Casper version has been delayed so many times, that brought lots of dissapointments and depressions on Ethereum investors, whom waited for it for too long, for months. I don't deny effects that the Ethereum Casper upgrade can have on the network performance as well as on Ethereum price (due to higher demands from investors, especially small investors whom can get benefits from staking). Nevertheless, Ethereum team should have transparently fixed plans and official announcement about the scheduled launch day of that upgrade. Even loyal investors might turn into weak-handed guys if they lost patience after months of waiting.