right?, its ridiculous, using other people money to trade just gonna get ourself a lot of trouble,trading can go wrong quite literally any time and if OP already have the capital there's absolutely no reason to use other people capital because there are simply too many implications here, they can be demanding their money along the way when the price of the asset you just bought are dumping which you should be able to wait it out for some moment later until the price back up again.
I don't think its any good idea at all to use other people capital for personal trades.
you're not professional fund manager that abide by ethics and law as well as being protected by the term and conditions.
It's not that easy to get access to big money, it doesn't work so that people will bring you the money themselves, for this you need to be registered as an investment or trading company, and there must be some kind of reputation, achievements and recommendations, otherwise you will not receive any funds .
But even if you have everything you need, you need to consider what risks you take on when you plan to trade other people’s money. This is somewhat similar to a loan, where you receive money. You will have to give it back to investors with part of a profit, so it is all a very complex and responsible undertaking.