That range of amount could just be for experiment if you think of growing your bankroll. If you are serious with sports betting, you don't put $100 as your bankroll, maybe $1000 to $10,000 as that is really for long term battle. That would measure also your capability as a sports bettor and you will see the outcome if you are profitable or not. Betting like $5 for 20 bets is not ideal, because we will lose the quality of bets, we should have a long term goal and always think of success, otherwise that 5% of your bankroll as wager is not so relevant.

My question is, what do your friends do just for fun?  What's more, does your friend really know the type of sport that he likes and understands? because that's important for me personally, so that we can minimize losses. although in the end, luck comes into play when we carry out a betting session. Talking about betting budgets, it comes back to my first question, what are your friends' goals in their sports betting. The answer is, keep it to yourself. Well, no matter how small the bet your friend bets, if it's for fun, it doesn't matter. However, the problem is, only with the bankroll that your friend has and the goal is to multiply as much as possible, it seems that it will be difficult to achieve this, especially if you bet no more than 5%. Well, I really like this type of football betting. usually, I bet on single bets. Just 1 or 3 matches is enough for me every week, and not more than that. The reason why I do it is none other than to limit the bets I make and to avoid taking part in unnecessary matches. The concept is simple, from among the existing schedules, choose the one that we think has a fairly high probability of winning. If in doubt, don't hesitate not to bet. Well, your friends can divide your bankroll for the three matches you have chosen. The result is according to the odds option that we choose. After all, there are many options of sports betting. However, if your friend still only budgets 5% of his bankroll, choose multibet with lots of matches. But don't have big hopes, because winning multibet bets really relies on luck. Well, make a choice with friends and and good luck.

There’s no way to achieved a consistent profit on gambling no matter what strategy he is using because of the house edge. The only possible to have a guaranteed profit in long term is by using sure bets such as arbitrage betting but casino can easily detect this method and seize the profit that he made.

Overall, gambling should be use for entertainment purposes only. Relying on it for daily profit will surely gonna give you losses instead of profit since all gambling games including sports betting has randomness factor on result which is very hard to predict accurately in long term for profitability.

I have a friend who is new to sports betting and he asks -
If his bankroll is $100 and he has been told not to use more than 5% of his bankroll per bet, what strategy should he use on this type of bankroll? His question is should he place $5 each on 20 different bets? Or is there a better approach that can be suggested?

There is no doubt that those who gamble with the intention or target of gambling using a certain bankroll or who have the intention of winning a certain amount are definitely addicted to gambling and they use gambling seriously. Because those who use gambling only for fun invest money in gambling according to their ability to lose over time and do not have any goals, they only take fun from gambling. Bankroll doesn't matter for them but $100 bankroll is not a huge amount so it can be used but it would be foolish to always have this target.

With $5 per bet, I'd rather do a parlay with just 2-5 teams. It would be better if he only bet on the teams, individuals, and sports he is familiar with. He should take it slow and not place 20 bets in one go. One parlay a day would be good; at least he will gain more knowledge in sports betting as the days go by. Sports betting is not like slots or any casino games out there.