Hi, I'm new to bitcointalk.
I'm only 15 years old and I'm Brazilian, I want to know which is the best long-term investment.
If you are a beginner, then you definitely should not invest based on someone else's recommendations. You are now at such a young age that you have enough time to start studying cryptocurrency, and to understand its advantages and disadvantages. And it is possible that by the next halving you will be able to independently make decisions about which coin you need to invest in.
It is not just something for the beginners or the young people, nobody should ever invest based on anyone's recommendation. If you are going to take something from someone, then take how to trade or how to invest, not what to. If someone tells you to invest into anything other than bitcoin which is the top ranked coin hence hwy it is trusted by everyone equally, then you should avoid that.
For a 15 year old, life is fast and it is always going to be something like "I need to get rich right now!!" so that they could live a good life, they want money as soon as possible so that they can do all the great things young people can do, but what they do not realize is that they have more time than all of us.