You don't need to cooperate in building your investment in bitcoin - if you are constrained by a lack of budget, you can buy as much as you have. There's no need to join a group where you and several friends raise funds together to get a lot of investment assets - in the end the profits will only be the same if the shares are equal. If you don't understand much about Bitcoin and investing - you can learn, you can do it independently without depending on other people.