As Richbased said, Tesla is one of the top 4 largest bitcoin holders and if they sell it, it will definitely have a significant impact on the market. So it's not hard to understand why people are interested in this.
There are many ways to sell bitcoins, they can sell through OTC companies, 3rd parties and not necessarily transfer directly to exchanges to cause chaos in the market. Most of us won't know when Tesla will sell bitcoin until their financial reports are released at the end of each quarter. This has happened in the past, no one knows when they sold their bitcoins until the financial report comes out and mentions they sold the bitcoins.
Looking at the price, it's still about 67k, so we can say it is doing fine right now and whatever this FUD was, it was for all nothing. I understand Tesla is rich, and I understand if they sell their coins that would be big deal, but we need to also realize there are a lot of people who have a lot of bitcoins that are just beyond one market, hence we can't technically really consider this as a big deal, it is definitely a big deal in the sense that if the price crashed then it would have been a big deal, but since price didn't move at all, then it is not a big deal and totally a FUD.
This is why we should not talk about "potential" of something when it hasn't happened, it's the same with every big sale SEC does, like "oohhh silkroad coins will be dumped!" and they FUD, but then nothing happens.