Fairly new to bitfinex but a long time lurker

That's madness, it implies at least a 25 times gain in bitcoin price per year.
I don't see the math??
current lending rates is around .2%/day
.2%*365days=73%/year
that's less than a double per year to profit
You didn't compound the interest, it's 0.2% ^ 365 which comes out to about 206% yearly.