Is bobmarley650 a scammer? He has a lot of negative trust and uses anonymous e-mail services. Should I believe him?
No, do not trust him.
He is likely to be running a scam of the ponzi variety.
What happens is that he builds up a reputation on this forum by paying off initial investors, possibly out of his own pocket or by gambling the funds, or more likely he is paying off initial investors with new investor's money.
Remember that even if he has proof that he is paying people, it doesn't make sense to trust him because he has not demonstrated to you that he is running a sustainable, legitimate business. He does not publish his trades in public as far as i know, so you will never know what exactly he is doing to your funds.
You'll find better ways to profit off crypto, without counterparty risk or lower counterparty risk. No need to invest in someone who already has neg trust on this forum.