Investing with borrowed funds??? People just keep making grave mistakes over and over for no practical reason, a mentor once told me to never start a business with borrowed money since I would never if the business will work out, only to borrow when trying to expand an already established business, borrowing to invest in bitcoin is just wrong, the person is not just spending money that they shouldn't, they are spending money they don't even have, how do they plan to pay back the borrowed money??? I don't think any bank would wait for 10 years to get their money back, so in a desperate attempt to save their future, they end up mortgaging it.
In as much as you are right in your own perspective, you aren't getting the clear picture here, if someone is investing with a borrowed funds, it might be very good, only if the person is paying back in an installment manner were it will be debited from his or her paycheck either weekly or monthly, and the interest rate must be on the lower side of it, if this are the conditions for the loan, it's too good to turn down especially when their is a dip in the market, take note that the loan can be paid back in an installment manner from your paycheck, so you probably wouldn't feel the effect especially when it's being spread out for like three to four years payment period, it's a calculated risk actually, but if this conditions are in place, it's a very good opportunity to buy a huge chunk of Bitcoin and add to your stash.
But if in all this, if the interest rate is on the high side, it's not good to take such loan because it's not in your best interest, this my own opinion though.
One thing for sure we should always know is that Bitcoin investment is not as the same having ownership of a business such that anyone borrowing money to invest in Bitcoin must have another secured plan of paying back that is not from his Bitcoin investment because if you borrow money to invest in Bitcoin and expect to pay back with profits you get in Bitcoin, that is pure gambling than investing , no one can be certain about the future of Bitcoin so anyone borrowing money to invest in Bitcoin should have it all planned out to pay back from another source because if you depend to pay back from what you will get from Bitcoin, you will end up messing your emotions and can even die in the process especially when Bitcoin is in dip season. Bitcoin is bond to be volatile you don't know to what extend how and when it will go up or down Why borrowing money and think you can pay back from it? Such person will never have rest or peace of mind.