It's an exponential increase, that's all you need to know to answer the question "Is it sustainable forever?" with no.

What stops it from going up exponentially forever is that in a finite system with finite resources you cannot get an arbitrarily high hash rate. Moreover, since the exponential is a very rapidly increasing function, resources will be exhausted pretty soon, so it cannot continue for very long.

Hashrate increasing faster than Moore's law allows for?

And then you will buy or sell?

Hashrate wont continue to rise exponentially forever. At some point it will taper off and the share prices will go up again.

This can be done with real money and I understand clearly how that works, but my real question is can this be done with ALTcoins?

the main one being

Satoshi Nakamoto has had a UK English based education. this is based on his writings being in the UK English grammar and spelling, as oppose to american.

The bitcoin community is about bitcoin, not about finding a boyfriend  it is not that you have to be attracted by people here

If nothing else, my little mini-minter makes a nice piece of desk art.  The little lights flashing every time a work unit completes is fun to watch out of the corner of my eye when working.

Since this is THE forum, packed with amateurs and professionals, i expect more answers...   

Bump, anyone have suggestions?

I know that two people generating the same address (maliciously or accidentally) is about as likely as the Sun and the Moon instantaneously switching places, destroying the solar system. But, if it were to happen, is there any way to detect it so it can be observed?

Is that already happened before?

Yeah but they would want the rank right.