Because most of my friends believe that BTC reached 100,000 US dollars in December, so I want to discuss whether this is true

You already has your answer mate , we are more than a week before December ends and yet what we have now?
For me i will answer you frankly , NO WE WILL NOT MAKE IT TO 100k this year.
and even if next year i doubt this will happen that is also why i will keep my holdings for more years and will never expect high this year and the next.
that's pretty self explanatory. the current state of which retaliated directly. I think, the current price of $100k is still unattainable. in fact, if the end of the year ends up being over $55k or $60k, that's already very good. what's more, if we start 2022 at that price, chances are, we can go back to discussing, and speculating that bitcoin price could possibly reach $100k or not.
Only a few more days and by assessment the value are not moving that hard to bounce back stronger, this current market still unpredictable if in anyhow it turned and bring back the barrier to $55K-$60K and yes that's the good time again to open this up in the next following quarter of 2022.
Unless there's a group of big whales who will push the price high before the end of this year