I think there are some similarities between the two. If you are a counter your bankroll should grow (slowly) with huge fluctuations on the way just like the stock market. The negative swings in both will test your will-power/limits, but you need to hang in there because eventually you will be a winner.
The only difference is that you can short sell stocks during bad times-like I did with casino stocks a few months ago! and doing well now! the only complain is that the gaming supplier stocks are still going up? why? any thoughts? The vacancy rate for Vegas is high!