I don't think it is worth your time to explain it to them because probably at the age of when they reach adulthood they won't see bitcoin anymore.
Bitcoin won't stay that long i think because it need to be controlled or the world won't accept it.

Bitcoin will probably not survive it after 100 years because then maybe something else will get in the place of bitcoin.
But ofcourse bitcoin can survive if we offer ourselfs up to bitcoin and invest in it a lot.

I think that it is not a good idea to explain bitcoin to teenagers because they don't even know how to spell it.
 it think they should first go to school and learn a bot about the world first.

The best way is probably already over witch was to buy the bitcoins at 1k and sell it at 7k. But it is already past 7 k if you buy any coin now it won't matter because there is not much profit to make from the bitcoin anymore.

I think buying right now won't make you a lot of money anymore so i think you should buy the bitcoin when the price goes down again. because then the value may go up again and you will make yourself a lot of money.

Bitcoin is a online crypto currency witch you should see the same as gold. Because with gold you can't really buy things. But with bitcoin you can buy some things online just like gold. But bitcoin is just not that popular yet to use it as a form of paying method.