It does not matter how many bets you want to do, that can not influence your winning chance, in some days there might be big number of matches which deserve to bet on, like yesterday, there were very important matches in one day, Man United Vs Arsenal, Dortmund Vs Bayern, Atletico Vs Real Madrid, I bet on all these matches, and in other days you might not make any bet. sometimes many matches a day give you a chance to compensate your losses if you lost in one match, or you can make a parley.
Finding value in sports betting is the most important thing you must do to be successful, by aiming money you should stick to the method of finding value and though there are a lot of games available to play online, that does not mean that you have to play them all.
For example, there's a game that both team in your thinking has a 50% chances of winning, would you still go with it? I guess not good because you are then relying to your luck, there's no value then.