This may seem like a strange post. However, I recently read a blog post that ironically illustrates the effects of the "profitability wall" that has hit been his by present day capitalism. As I'd imagine this, wall, it is the concealed by many devices and it has existed in more disguised form for quite some time (more or less since 1973). But now the wall's outline is visible in quite few places.
The blog post in question describes the "desperate" competition of "angel" technology investors to put money into Internet start-ups. I don't feel sorry for these investors. And even more, this isn't a new Internet boom. Rather, this is a powerful result of the overall unprofitability of capital - those few areas where some promise of profits exists are over-run with desperate small capitalists. And small capitalist are especially desperate since a decline in profitability indeed throws them into the proletariat.
Anyway, I suggest reading this:
With those points in mind...