No! These days, most betting websites can get your withdrawn money back to you in as little as a few hours up to 1 or 2 days. This is a process that is gradually getting even faster as technology improves. So if you make a good profit on a Saturday, you could have it in your bank account by Monday or Tuesday with no problem. At the time of writing, some sites have started using a new faster process. Smarkets, for example, will have my withdrawal back in my bank in a matter of minutes now. This is great news for matched bettors as it means you can move your money about faster to where you need it to be.