Quantum computing exists. It is simply not competitive with regular computing.
What you're effectively asked to invest in is some very early patents on components that could eventually be scaled up into industrially viable quantum computers.
Because NVIDIA dictates enormous amounts of investment capital through it's valuation, the CEO's statement effectively means fewer dollars towards improved engineering and less likelihood that patent holders will put together a viable product before those patents expire.
I mean, quantum computing does exist right now, it’s just not terribly stable or useful yet. With time and bucketloads of engineering it could be a huge change in how we solve problems.
My understanding is that it is incredibly useful for very obscure and specific things, and not very good at all for general purpose computing (and it may never be).
Not yet, I think. They're still too small from what I've heard to be useful for really anything at all, but they are improving and will likely start to be useful in the next 10 years or so
Because they figure that if quantum competing does happen, it's going to be huge and if you're invested early you'll make big profits. So they take the gamble and buy stocks now just in case.
These are the people with enough money to go around to gamble on a bunch of stuff like this to play that odds. Statistically one of those bets is going to hit the jackpot and they earn all those bets back with a big profit.
Don't forget dumbasses like me who started gambling while stuck at home during covid. I buy ~$20 of speculative stocks every few months just for the thrill. It's basically the same thing as buying lottery tickets except it keeps me entertained for months or years watching them spike and fall.
How's it going? Not well. I'm sure I've lost more than I've made but it was money that I was okay with losing... same as a casino I guess.
The stock market is just gambling. But it's not betting on a certain company's well-being, it's whether high frequency trading algos and market maker loophole abuse will make your portfolio improve or not. If you foresaw the dude saying the thing and got some order set up to catch it in time you might even get a trade on the lit market, but most trading happens somewhere else at different prices and at times you're not allowed to participate.