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Results don't swing back to normal. If you flip coins for a lifetime and your first flip is Heads, over your entire lifetime if you continue to flip coins the odds are that you will have one more heads than tails when you stop flipping upon your death...in the short term (on your first flip) that means your result is 100% heads and 0% tails, but by the end of your life odds if results hold true to form you'll be 50.0000000000000000000001% heads and 49.999999999999999999999999% tails. It's the sample size (the denominator) in the probability equation that makes short term results meaningless, not the numerator.
Likewise, with Blackjack, if you start the year off on a tear and are winning like crazy, it's very likely that by the end of the year you'll still be above EV. But by the end of your life the sample size will have gotten large enough that that early big win you had at the start of 2014 will become meaningless.
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