When I first read the thread I thought"well this is a risky bet for TMAN"
Because cryptosparks says he can make 700% ROI. Well , even though it is a obvious scam he might have some trading skills. And TMAN if offering his Avatar, signature, betting 1btc, and he is also an "amateur" , not a professional trader , afaik.

But then, cryptosparks, with 700% not, is afraid? Is inventing ridiculous excuses like escrow and now "one week is nothing"?

This cryptosparks is really a scammer. If he had any trading skills, he would be able to clean his reputation here .