I just curious about statement "only 21 million BTC are able to exist in this world"
I got curious as well can you give the link from where you have see that statement?
Imagine that I save 200 bitcoin in my wallet, and there is no one, even single person I taught about my asset.
When I die… what happen to that 200 BTC?
If you die and your Cellphone is to much personal and no one knows about you password or your into bitcoin. Well it will remain or some hacker may notified that the 200 bitcoin of yours never been move for so long than maybe, just maybe the hacker will go and grab it.
If its still there, aren't 20.999.800 left in the bitcoin circulation until the end of time?
Base on how I see and study this world of Cryptocurrency. Yes it will remain but who knows.