What do you think about the idea of giving access via API to your exchange account to a professional trader (who shows profits even in this hard times), who will manage it and receive some % from your profits? Is it a common practice to do so? Do you know someone who tried this approach?
The first rule is that you don't trust anyone, specially if it concerns money. So If I'm in your shoes I wouldn't just give my access to anyone, even to those so called expert or professional traders. Chances are, $10 to $10 million, it doesn't make any difference, people will go and swindle anyone for that kind of amount, so just be careful.