Will you be excited about that?
What if BitOffer Quantitative Fund can make it?
Don't say it is impossible... You don't know how a quantitative team can do to arbitrage from the bitcoin market which is full of volatility.
Nobody can guarantee anything and giving out returns just by doing arbitrage trading seems like a rare possibility.
Besides that what's the proof BitOffer is giving out in order to guarantee it's users for a 20% return.
There are many companies who promise to deliver high returns but fails to do so and we call them scam.
So unless you have claims based on proof and genuine artifacts nobody will listen to what you are saying.