Avoid ending up like a friend, who used all the money he has to invest in bitcoin and also took a loan, promising the lender that he will pay back when he gets paid in a month, after a month he never received the salary, I warned him doing this, because he has no doubt mixed investment with 'whatever it takes', is it safe to call this greed? I don't know.
I am wondering if you are talking about a bitcoin investment offered by a possible scam company or Bitcoin investment where he buy Bitcoin directly from the exchange. If it is the latter, then I feel sorry for your friend since I believe after a month of investment, the promised profit (possible the salary you are talking about) wa not delivered and the company went rogue making your friend lost his investment.
Now he wants me to lend him some money to at least pay the loaner back and later settle me, there is more, now I have to send him some money to buy some food.
You don't have to use all your money to invest, even if you are not married yet or have other responsibilities, the best approach when planning to invest in Bitcoin is to buy with some percentage of the money you earning, maybe through business or a job.
If you do this weekly or monthly you won't feel any pressure, always remember that health is wealth.
Well, it is good to hear that you are helping your friend to recover. I hope your friend learned his lesson well that he should only invest the money he can afford to lose. Or accumulate Bitcoin over time with the free money no matter how little it is.