You are claiming that you are taking coins from people, sending them to exchanges, trading with them, and then sending the profits back.
You could go part of the way to showing that this was true if there was a public ledger showing all of the transactions.
One of his accomplices inadvertently did that already. have a look here:
https://bitcointalk.org/index.php?topic=835706.msg9339047#msg9339047.22 BTC deposited in to this address:
https://blockchain.info/address/15BfzBttWvmYq2eSK7Yt9RxYDSWBaWv9nEWhich where then siphoned to here:
https://blockchain.info/address/1HEt984iQ93snJVQWqrD2qu8aANah588esAnd remained untouched ever since. Im sure our scammer will start mixing those coins upon reading this post, but he hasnt done anything with it for the past 3 weeks, yet somehow made 7% profit on it.
BTW, I assume the two 0.01BTC shares runek1 owns, for which there are no matching deposits, is his affiliate link loot. All that trouble, all those lies and all that guilt for ~$7 that he probably wont even be able to withdraw.