1. It's a free market. If it begins to cost more to mine Bitcoin than it is worth (considering all costs into consideration), more people will start exchanging fiat into Bitcoin and fewer people will mine. This will reduce the mining difficulty while increasing the BTC/USD rates.

2. You got to be kidding. The fastest US supercomputer is about 18 peta flops. The world's fastest is about 35 peta flops. The Bitcoin network difficulty crossed 12,000 petaflops or around that range, depending on how you calculate it.

3. The first mover advantage is a disadvantage because you might think of a situation where some legal entity in some country might think of outlawing Bitcoin without ever figuring out how to enforce it?

4. If finance were about compassion, there wouldn't be thousands of people dying of hunger while we have bajillions of tons of food literally destroyed in other parts.

You've mentioned the 'bad' parts, without much merit, IMO. You didn't consider the better cases, let alone the best. Everything from escrow payments to digital identity to autonomous agents is encoded in the protocol that is yet to be implemented. Bitcoin isn't a gold replacement or a cheaper credit card, it's a fundamentally different way of thinking about finance and economics.

You should have your doubts about Bitcoin when there's a better competitor out there.