one big reason is because one can borrow against their own collateral as well. The borrowed funds are used in a leveraged trade, while the original collateral remains locked up. This is essentially a double long posture toward the market. it could also be used to hedge as a short
example 2
I think ethereum is going to go up substantially in the coming weeks or days. I put 10 ether into a smart contact as loaned liquidity to a market pool. Against that ether I make small interest. Also that deposit allows me to borrow ether at a reasonable interest rate approximately 5 ether.
I have two choices at this point to allocate these borrowed funds in the market.I can extend my long position ( basically locking the inital 10 eth is a long play) by using the borrowed funds to make a leveraged long play, lets say 5 x just as an example. If eth goes up 20%from todays spot price around 400 usd, my 25 eth play makes me $2000,and i had a near zero cost to enter the trade. also my original 10 eth collateral made me an additional $800 plus the interest ganied form the liquidity pool.
On the other hand, lets say i want to make a short play to cover any potential loss on spot price in the interem. I take my ether borrowed, 5, and margin short it at 5x. If the market goes down 20%, i made $80 for each eth times the lererage. which in this case is 80 X 25= 2000. my original eth lost $800 in total value, but my short made me 2k⦠net profit of $1200ā¦
interestingly enough i could then flip my trade at my tp point back to lon,taking the discount on the new price of ether, and if it returns back to the original spot price I could potentially make another 2000 on top with borrowed funds at relatively low interestā¦