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"Bitcoin mining was a weak point in the design though I can't think of a better solution. I think Satoshi underestimated Moore's Law and the impact of innovation driven by greed publicly justified by an intent for wide-spread adoption. I predict the 21 million bitcoin limit will be reached much sooner than 2140."
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No, you need to look into the mining mechanism and the adaption of the difficulty and once you understand that you will understand that math is not weak and that greed cannot beat mathematics and that Moore's law has no influence on that.

Math makes the difficulty of mining adapt to the greed and that's not a "weak point in the design" but outright brilliant.

++jp