This statement from Elon on
$TSLA is more significant than you think. Here is my take on it:
1. He is super confident that the valuation today compared to what it will be is low. He bought $1 billion worth of stock at an average price of $396 or at a valuation of ~$1.3 billion. This speak volumes as he believes there is massive growth ahead (and there is).
2. This also indicates that he will not be selling
$TSLA anytime soon unless he has to (taxes). Even then, he could paid those taxes by selling his other assets in SpaceX and many other companies.
3. If Elon does decide to sell
$TSLA, he risks his 25%-26% ownership at Tesla after completing his 2025 comp package tranches. Buyback could eventually help with that but that's some time away.
4. This reply was a response to fresh rumors of Insiders selling, most likely targeting Elon. Great signal from Elon shooting this rumor down as it squashes any kind of FUD.
Overall this shows confidence that Elon not only believes the stock could be cheap right now when looking 5-10 years down the line, but a massive bullish signal that big growth is around the corner. When a CEO says they are doubling down on their own stock and are NOT selling, it's a clear indicator that something big is on the horizon, which if you're a long term
$TSLA investor, you already know. And besides, why sell when Tesla is going to become the world's most valuable company?