Because usually a guaranteed return is sketchy, especially every 24 hours You must be like a pro trade, a whale, pumping and dumping everyday. It is not possible for arbritage to be that profitable, if you could be transparent on how you are making that kind of money, and told us, that might build a little bit more rep. But now it seems like a ponzi.
If I told you what I was doing then no one would pay me for my services, thats why I am start with small sums of bitcoin. I'm not asking to flip your full bitcoin in 24 hours. I am very confident in what I do, to the point that I will use my own personal funds to recover any losses. Theres no scheme, scam, or shady practices.