rivkin rules on investment.

If you don't have a number of good reasons for holding an invesment, then you should not hold it.....the fact that you bought it above the current prices is not a good reason.

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I have never met a rich chartist
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Never invest in stocks that are run my management that has failed in the past.
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Don't wast time worrying about past mistakes - learn from them.
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The value of insider trading is over-rated, as Warren Buffet says "with enough inside information and a million dollars you can go broke in a year"
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To end on a positive note:

If a wrong decision was made based on sound evidence, there is no lesson to be learnt.