There are funds out there that conduct these activities, I know because I recently consulted for one. They are promising risk free returns and getting them.
There are things that exist in DeFi (such as flash loans) that have no real world equivalent, which is why blanket statements made about traditional markets don't necessarily apply. If used properly, these things do in fact offer "too good to be true" types of returns.
As in, $100 in January becomes $500 in February, $2,500 in March, ... $976,562,500 in December?
Edit: actually I read that wrong, that would only be 500%. 5,000% per month (money x 50) would turn the $100 into $9,765,625,000,000,000,000 by December.
Unless by 5,000% yield you mean you get 50x your original investment on top of the original investment, like how 5% yield on a dollar gets me $1.05. In that case it would be more. But I think the 9.8 billion billion would be good enough for me.
Surely you see how even a 10% safe return on investment like these DeFi schemes offer is a whole different thing, when it's a compounding return. There's no way to sustain it. All the arbitrage opportunities in the world can't deliver the funds required to make investors' money grow exponentially.
I agree with you that throwing money at anyone who tells you they can take an unlimited investment and offer compounding returns on it is a recipe for disaster. But in DeFi, intelligence and strategy translate directly to greater yield. Math has proven time and again that those things matter very little in traditional markets.
Is your counterparty risk always zero (between you and the chain)? Custody? What if a chain is halted or amended?
These systems run on novel rails. You couldn’t honestly tell an investor “you will not lose your funds,” and you’d refrain from using the word “deposit.” Because you’re trying to honestly communicate an opportunity, not to defraud.
In the case of flash loans/swaps, the answer is yes. It's 0. Further, I never have any capital at risk, all of my bots use flash loans/swaps. These transactions are atomic, which means that either all parts of it succeed or they all fail (it's a "revert" in blockchain parlance). So I can borrow $200 million without any prior permission and do an arb/liquidation or anything else I want with it for the life of my transaction, with the only requirement being that I must return it by the end. If my arb/liquidation/whatever succeeds and I return the loan, I keep the profits. If not, it's as if the whole thing never happened. The only risk is the transaction fee, which on the chains I do this on are miniscule.
I realize that it sounds unbelievable, but it exists. My code does thousands of these daily. I am not the only one doing this. See https://eigenphi.io/ . With the exception of sandwich transactions, every one of the bots you see on there is making profits without any capital at risk.
The risk of the trade on chain defaulting is virtually non-existent, agreed. Custody risk is never zero. Dollar in / dollar out returns involve lots of counterparties.
"Insane" is subjective. The point is nothing safe yields ten or 20%. Someone saying "you will not lose your funds" [1] when paying above-market yields is lying.
[1] https://stablegains.zendesk.com/hc/en-us/articles/4402680425...