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.
No matter how extraordinarily smart and creative a certain team is, there's still no such thing as guaranteed money. If anything, anyone advertising something as "guaranteed money" is actually mostly a "guaranteed" scam.
definitely. nothing is for sure.
higher reward will usually come with higher risk.
but there are ways to protect capital and in crypto 20% apr is not impossible to reach (for some it's quite low tbh).
anyways OP could be clearer.