Single bets or accumulators?

Many people like to bet on accumulators i.e. linking more then one bet together to obtain better odds. Sure when you hit your going to make a lot more money. But I am a big fan of statistics, and betting on asian handicaps a team not only has to win but they also have to cover the spread. I believe that even if you break everything down and your certain of something your still going to need a lot of luck. So I reckon the chance of a certain win is actually only about 75% of winning.
Now put that into an accumulator and you will see below how lucky you need to be to get a win:

1 match = 75%
2 match = 56%
3 match = 42%
4 match = 32%

You get the drift basically the more matches you accumulate the less chance you have of winning. Bearing in mind 75% win record is really high and that’s only for one bet.
Sometimes its worth putting in a small stake on accumulators every so often to test your skills and add to the excitement but anything over 5 unit is not recommended and if you do it regularly then you are sure to be a bookies best friend.