GP asked how it could be possible, this is how. GGP suggested that he'd made such an investment, just at too low a principle amount to see such huge returns. If so, it doesn't matter that the investment was risky; the Sith lord in question made the investment in 2017, and would be looking at crazy returns today if he'd had $100k to put into it, rather than whatever sum he actually did.

As to

>why OP didn't get a loan to make these investments if they were such a sure thing.

You could ask him. Perhaps he didn't qualify. There are people who did this; depending on entry timing, you would certainly have seen enough returned to at least cover interest payments.