You are promised $10k in a year. Take out a loan today for $10k or wait til you get the $10k?

So is it "don't invest what you can't lose"...OR...."don't ever take out a loan to buy Bitcoin"?

A friend took out a loan to buy Bitcoin so of course I berated him. Then he calmly explained how he has been killing it at work and has a big commission bonus coming, so repaying the loan was not an issue. He also doesn't have kids, debt, etc. I gotta say, his point is valid, so kinda don't blame him.

But seems the #1 rule is "don't invest what you can't lose" and #2 rule is "don't EVER take out a loan to buy Bitcoin."

Does he qualify for the exception? Would you do the same?