Nowadays, no one believes BTC will dramatically drop to below $20K in 2021. Everybody is crazy in bull market , but risks are building up.
But the energy changes immediately the bear steps in then you'll beginning seeing prediction of how low the market can go. When the whole market is bullish you'll hardly see a possibility of it dropping very low. Remember 2020, nobody predicted a low of $4500 but it did happen due to the pandemic that affected all market. Bitcoin been below $20000 can't be ruled out in 2021 as nobody know what bad news the years has in store for us but hopefully it'll not be very devasting.
We can see how the SEC going affect RXiP sorry XRP is affecting the price and privacy currency are already getting delisted form some exchange. Probably there is some bitcoin fud upcoming. I think (my personal opinions though) we can retest the $20k price in 2021 but the overall sentiment is still bullish and the then retest the $10k.in 2022 when the bear season begins.
Yes, what happened to XRP is a great example. Imagine MicroStrategy (the company that recently bought $1B worth of bitcoin) gets investigated by the SEC. The first thing they will sell is their bitcoin. Or they may be forced to sell it. Yesterday there was a 10% price drop due to just 150 bitcoins being sold at once. What kind of crash will we get if $1B worth of bitcoins is being sold?