In 2016 when I was a kid, this coin got in stuck in my mind but absolutely everyone around me was telling me to forget it, it's scam, it's online shit, I shouldn't study it and should move on something else and finally ended up working hard absolutely every day for years to migrate in Canada to learn in university and pay high tution fees.
Your skepticism about the BTC at that time was right to some extent because, many people faced a lot of scams and hacks, and the MT Gox scam was not that old then, (Only 2 years old) I know that's old but it is enough for haters to spread hate among newbies using such events. And then in 2016 the halving came and then you missed the chance of making money in the bull run. But one thing that I don't understand is this:
Finally, I finished the university and gained PR but the money that I have spent in all of these makes me cry every day. If it weren't my parents and I would invest in bitcoin in 2016-2017, I would be a millionaire today. I totally missed 2020's boom because of my situation
There was not boom in 2020 instead the latest ATH was in 2021 after the halving in 2020, maybe you are referring to that period by calling the halving event which took place in 2020 but I think it is better to name the correct date which is 2021.
but now is the time in my life where I stand on my feet, not strongly but I stand and manage to live and save some money. As I see, there are guys on this forum since 2015, they are here still today, so I want to know your opinion and want to hear your advice about Bitcoin. As we all know, halving is coming. Should I invest my savings in Bitcoin? Or should I lean towards altcoins this time? Which one? I don't have health problems and don't have to worry about job security but it would make me sad to lose all the savings but life in Canada is getting expensive every fucking day.
I am not among the members who are here since 2015, but the answers to your queries is simple, If you have the knowledge about BTC and do know how much potential it has then you might not ask these questions but still if you have asked them and also asked that either you have to go with BTC or ALTs then I doubt you trust the BTC system. Because money is not everything, but if you are after making money then for quick money you can go for ALTs, because they are more volatile but if you are after a good and less risker investment then BTC is best choice here. But you have to be sure that, the ATH will not be sure after the halving. As bull run continues for hell lot of time.
In the previous halving, the bull run continuous for like 6, 9 or 12+ months. Means the ATH was made after that much months. So, you have to invest with clear and educated mind other wise you will fall prey to market sentiments.