If you're seeing public addresses that has got a lot of transactions and don't have a balance left anymore, it's because that's their public bitcoin address and you'll never know how much they've got with their private bitcoin addresses.
That's better be kept and not broadcasted even if we're just remaining anonymous from different online communities.
Yes, I have already read a lot of information here and on other resources. I can say that there is still a lot to learn. I still have the fear to invest in something. I want to get deeply into this niche first, so that I can better cope with stressful situations. I see that many people involved in trading should have good mental health. But thank you for your answer anyway.
It is normal to fear investing if you're not yet knowledgeable about it. It's better to take it slowly and learn as much as you can before putting any money even in bitcoin.
That's right, I can't even imagine the feelings of people who bought bitcoin at its peak price and see its price now. Although, most likely, these people knew all the risks when they bought it.