making sure to choose a Bitcoin asset to choose from is not a bad thing. but forcing someone to invest is the problem when we don't explain everything well.
the understanding of a beginner will be different when we see that they see success in investing in Bitcoin. they will see it is very easy to do and they can do it too. make sure every beginner knows the risks and they make their own choice.

That’s also my concern the first time I heard the story. However, I’ve come to realized that maybe he has been earning that $500 for quite couple of months so it’s still considered as his spare money that he can afford to lose once his investment fails. But as long as he’s aware the high risk that comes along with bitcoin investment, then that’s fine. What’s important is he knows his investment well and if ever he won’t be profitable on his first attempt, he won’t just quit easily but continue to invest for long term.

I appreciated your comments and directions that are given. Although anyone has right for dissenting point of view and reservations that how I can invest. You should also told him that "do you own research'' because Bitcoin will give him guaranteed profit and he should manage risk also so that he does not get the wrong guide.

Whenever i told any new friend about btc then first i told him the the interestes history of BTC start and other information that Bitcoin transactions are verified by network nodes through cryptography and recorded. Bitcoin trading offers several potential advantages, often referred to as "plus points." Its value is highly volatile, meaning that it can fluctuate rapidly in short periods of time. This is due to a variety of factors such as market demand, supply, and regulatory changes. Its high profit potential, liquidity, security and variety make it unique amongst the other networks but the same time it's price can go down if any uncertain happen or any bad news comes in market so that he doesn't invest other than he afford to lose.

Well, hopefully that is truly the case here because investing a $500 is already considered as huge some for someone with a $400 income per month. Nonetheless, we are not that sure because the OP didn't specify either if that $500 was just a spare money or not, but I seriously hope that it's really a spare where there's no quarrel if everything goes sideways and that the OP's friend knows the risks when it comes to investing crypto where volatility is much higher compared to other fields.

Of course, you did a good job teaching a person about Bitcoin. Since you gave your friend some idea about Bitcoin investment, he may have gained special knowledge about Bitcoin later on. But you told your friend that you were not interested in investing in bitcoins yet your friend invested. This suggests that your friend may have had some idea about Bitcoin before, which is why he invested his money as soon as you told him. But be sure to warn your friend that the Bitcoin market is not always stable. So that you don't get impatient if you lose it, but you have to be patient for a long time by investing in Bitcoin.

You have done well by talking your friend into Bitcoin investment, it is a nice move in the sense that it helps to build the Bitcoin community. But on the other hand your friend needs deep understanding and  knowledge about Bitcoin I understand you told him about the profit and lose but then it is not enough he needs a deeper knowledge for him to excel more in Bitcoin world.

Let's just hope that your friend is not of the same mindset as others who blame those who teach them or introduce them to bitcoin and are confidently trying it because they think that it is an easy profit or because they just invested in ponzi. It was really good advice, but you also told him that it is better to hold it for a few years. No matter if he just invested $500, he should add more of it, like getting around $20 on his salary.

As long has you also mentioned the risk involved in investing in Bitcoin you gave a very good advice to your friend. But hope you mentioned the your friend never to trust any exchange with his coin. Remember not your keys , not your coin. Always tell your friends to choose cold wallets, preferably hardware wallet.

OP mentioned risk, but I bet he's just more profit focused, and that friend will also be asking more about profit than risk. Most newbies will have the mentality of hearing about profits and rush to invest without any knowledge. OP, I'm not like a lot of people here, I really disagree because your friend doesn't have the knowledge to invest in bitcoin.