May I ask you to share your experience and advise about how to borrow ETH to buy BTC, please? I'm interested in taking adventage of price action so could be settled off-chain.
What do you mean by borrowing ETH? The price of ETH is far below bitcoin. Borrowing money to invest in bitcoin is very risky. Market prices in crypto are highly volatile. So it is strongly discouraged to borrow money for investment in crypto.