Just for the experience of it I think a group bet would be cool and splitting the winnings of course would be fun and I’m sure there would be celebrations and fun as a result of the winnings so that would be dope. If not winning it would suck for everyone but still probably end up with a night on the town so you really can’t go bad either way haha
if all your friends enjoy and have fun, betting with friends is not a problem. whatever the result is still feel the pleasure. but as OP said, it can be bad when there are one or two of your friends who start thinking about getting all the winnings and enjoying it alone, that would be bad. if it is a very close friend to you, maybe there will be a little risk. but if there are friends who are not so close there, then it can cause problems. money can affect a person's mind and ambition.
OP, the example you drew happens to be true in many cases. Especially in multiple friends there are some characteristic friends who are a bit selfish type. If you can share business with them, sometimes they are dishonest with other friends. I have come across such friends in real life and they tried to own everything while doing share business and at some point my friends deprived me of everything. This can happen in gambling if money is pooled with friends to bet, then at some point selfish friends will decide to enjoy the profits alone from betting large amounts. You should always be careful and careful from these friends because these friends are looking for opportunities and if they get a chance they harm their trusted friends.