No, it is not possible for bitcoin to fall to "lower prices" ever again. Certain levels are gone for good. For instance we can be confident that any of the low prices such $3k, $5k, etc. or even $10k that we had this year are never going to be repeated.
Like always bitcoin adoption is growing and with it the price will keep going up. Each time it sets a new record more lower prices become impossible.

However we can not predict the short term behavior of bitcoin. There can still be big volatility in the following days and price could come back to below $20k with some sort of panic sell, I don't expect anything below $19k though. One thing is certain that $20k is going to become the strong support. We have to see how the momentum continues.

The support is forming already and lots of institutions are pretty bullish with it. But like what OP asked, he is asking for possible fall down again, well we can't say it's not possible in my opinion cause there is a probability of retracement in every bull season. Maybe we could stay for this ground for a long time but we all knew that in every market there is always a retracement. The bull happened overnight and some professional traders and bag holders have the sell pressure with this kind of level. Anyway just my 2 cents.

That's where you are wrong, the "bull" didn't happen overnight, breaking $20k did. There has been a nice and steady upward movement for the past 3 months starting from October 7. And now price is simply 10% higher than $20k. A percentage rise that is very common and small in bitcoin bull runs too.

I don't disagree with the possibility of a correction but also keep in mind that we have already had 2 major corrections during the past 3 months and many more small ones so it can't be a huge drop. A $2000 (10%) rise can not be followed by a $2000 drop because bitcoin is not a "pump and dump" and that would not be a "correction" anymore.

Such a big drop (21%) in your example can not happen out of nowhere and without any reason and it won't be a "correction".
Although it also depends on other factors. For instance the market trend, a bear market such a drop is so much easier than in a bull market.
Another factor would be how the said price was reached. In your example if $19k were reached over a long period of time with a solid buy support then the follow up drop is going to be so much harder than if it were reached in a short period of time due to hyped up panic buying.
And another factor is the buy supports. For example $6k has been a very strong buy support and millions of dollars dumped into it and lots of manipulation could never break it. It took the world economy turn into shit due to a world wide pandemic to break it! Even that couldn't last more than 6 days before price jumped back up above it!!!

I will lock in today's price December 17 2020.


https://coinmarketcap.com/currencies/bitcoin/

The development of "correction" if true and false in the next three days to be precise on December 20, 2020.
I want to see Bitcoin in the next three days.

I will forget about the current predictions, talk about the current market developments in terms of changes in the Bitcoin price and also its factors.
What percentage went up & down for three days.

Note: this is just an exchange of opinions about the current Bitcoin price based on the experience that has happened.

Exactly. It's important to consider price points as a geometric progression rather than arithmetic. For example, $20k to $25k is a 25% rise. Although it means a price increase of $5k, this sort of rise would be much more similar to $10k -> $12.5k (+25%, or +$2.5k) than it would to $5k -> $10k (+$5k, or +100%).
If we want to look upwards from that broken $20k barrier up towards $25k, then we shouldn't be looking back at $20k - $5k = $15k as a mirror image, because it's not. Appreciate this is a simplification and there are all sorts of other factors to consider, but often for bitcoin % changes are more relevant than $ changes.

Some form of correction is inevitable at some point, you see it every time. But I'm not sure we'll see it in the next 3 days.

The increase is not to stop now as the price can increase more in the next day. It is a good time for bitcoin to rise, but it also makes us careful because bitcoin can be fall later. But I won't say that the price will go down below $20k, but that could happen later, especially if the flash dump comes to the market. If the flash dump happens, the bitcoin price can go down to any lowest price, but that will go back to the current price before, and it could rise higher.

We really expected BTC to topple the 20k barrier soon, but i didn't see it coming or happening so soon. The market has an upward/downward movement in price value, however it is safe to say that the value of  BTC will not return to some certain price levels again.

Of course things are different this year with 2017, why is that? the pandemic factor could be one of the causes which resulted in the majority of people being more likely to be at home so they had time to learn bitcoin, plus most countries are likely to experience a recession resulting in a number of countries having to turn to secure their finances, so that the impact can be one of the affected is bitcoin.

I think this year is the beginning of the peak of bitcoin in the future and it is not impossible that 30k will be obtained soon.

I have been watching the market closely in respect to bitcoin, yesterday I was shown chat flow by a friend that bitcoin has surpass  $20k and it was really nice seeing this kind of pump, next year I believe that bitcoin will rise but the stability is what I can't tell because of the volatility nature the market possesses.

We are not yet in the top, so I doubt that we will experience the burst that was 2017. The real bull run is 2021 so we have a lot of leg room to work and see the price goes to $30k or even more.

Again as I have said, we're not yet in the bubble, this is just the beginning.

Exciting times ahead, 2021 will be huge for bitcoin and the rest of crypto market.