Join Date: Sep 2004
Posts: 20,377
Yes, the two theoretical problems with card counting are that you need a huge increase in your bets on good counts in order to get a good edge, and even with a good edge you're still looking at massive variance in your results, and so need a huge bankroll to match your huge bets on good counts.
It gets worse when you account for the fact that the casinos that can exclude skillful players are watching for those big bets on good counts, and so a practical limit on what you can do is set by that.
Search the forum, there's lots of discussion already.