At current difficulty, 2 hashes/second gives about 614 trillion years to find one block. Not quite the heat death of the universe, but wikipedia says all stars in the universe will have exhausted their fuel.

At my current electric rate that would cost me $912,997,246,800,000 in electricity to find a hash.

And $47,261,000,000,000,000 in electricity to watch the stream that long.

A bitcoin would easily be worth that by then

huh. I have 1.61 hashes/second, and I only came to 535 trillion years. Maybe the difficulty changed since I did my math.