Not only miners, but I bet angel investors are pissed too that they didn't just buy btc directly.
Nah, they will be just fine.
They'll be fine, but they could've made 3x their money already assuming they handed Barber over the capital when btc was around $100.
If they had faith that Bitcoin would triple they would have done just that. Many VC putting money in Bitcoin see companies and services as a way to rise the wave of higher adoption without taking a risk on the exchange rate itself. If you owned a chunk of Bitpay and the exchange rate fell but real adoption increased and the company doubled gross revenue year over year well it is still a good investment.