You kind of answered your own question. Yes you do need to do whats best for you but you also have to understand that everyone else is watching, and if they all follow the lead of fishing investors then the price will continue downward in this case. Dont kid yourself, the 'masses' of investors are sheep, and will follow whatever trend is happening until something makes them go in the other direction. (Oh yeah, and the longer they go in one direction, the harder it is to get them to reverse).
As for the blackjack, you'd certainly better be aware of what everyone else at the table is doing, theyre playing from the same decks of cards that you are! Thats why card counting is so successful and why casinos want it banned:)
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