Well, I can't prove Connor MacLeod-type immortals do not exist, either... But I'm pretty sure I'm not going to ever see one outside of movies and TV!

This crisis, if anything, will not spell the end of real capitalism because we haven't seen much of it in the latest decades, but hopefully it will cause the downfall of the bastardized version we've seen so far.
In a truly capitalist environment, there's real competition and the little guy can bring down the big guy if he's got the superior product. In real capitalism, if I can build an antigravity engine that removes the need for fuels, I can sell it out of my garage, make zillions and draw the oil companies into the gutter. In the world we have now, the big oil companies will run me into the ground with every legal trick at their disposal, and the governments will help them to "protect their investments". Yes, it happens, especially with telcos.
The last time I've seen real capitalism in action was with the Home Computer Revolution in the late '70s to the late '80s: some people make a cheap CPU (Mostek) some guys in a garage make up the Apple ][, it caters to a niche market, it sells, some other people write VisiCalc, it sells and it benefits a lot of people because it allows every small business to have an effective in-house financial analysis feature. The early internet business boom was also an example.
Do you think that in the current environment it would have been possible? No. IBM, ITT and some other big firms would have taken the whole pie for themselves and destroyed every competitor. There would not be any Apple or Microsoft (ironically, they behave much to the same effect as the old giants would have). The internet would have been nipped in the bud and regulated from day one to benefit a handful of competitors.