You can have 99% of validators on Ethereum censor your transaction, and you'll still be eventually included. With 12 second block times, your transaction would be included in roughly 20 minutes.
I think you're missing part of the story with stocks like NVDA. The value of a stock is also based on expectations, so it could be that all of NVDA's growth for the next decade has already been frontrun by the market, and it's essentially partly a prediction market on how valuable the infrastructure will be for AI, given that the chip requirements will only increase as AI systems are implemented in more and more hardware (robots / appliances / transportation / medicine, etc.). While the growth potential of carbon fuels really remains as it is with modest growths aligned with demand/population, but tempered by alternate energy taking greater and greater marketshare.
So it could simultaneously be hype (very optimistic predictions) and yet still valued appropriatey by the market with future expectations priced in, just with some additional premium due to that demand/hype.
Do you think this changes if we incorporate a model into a humanoid robot and give it autonomous control and context? Or will "faking it" be enough, like it is now?
And what about the other billions of people on the planet that don't even have a library, let alone a doorstep to receive a first world delivery service.
You'd want to use a KYC'd L2 that is still secured by the L1. The consortium would just validate transactions on the L2, and the security overhead is payed for by publishing to L1, so no need for validators actually validating and retaining blocks/data. Just a single. or multiple centralized sequencers. That way you also still have access to liquidity if you want additional KYC'd financial services (like for services using USDC), while also having the benefit of a closed carefully monitored system.
To use the Sun, the focal point would have to be situated about 542 AUs. Certainly not impossible, and the resolution would be quite good, good enough to see surface details of an exoplanet.
As someone who is in airplane engineering, the biggest barrier today to building a new aircraft is regulations. But if we completely ignored regulations, and you were building a mostly aluminum aircraft with analog avionics and the goal was just to get it to fly (nevermind things like designing for fatigue), then no it wouldn't be that difficult conceptually on paper. However, manufacturing would still be the bottleneck, and that is still challenging today (tolerances, QA, technical expertise).
However, if you were designing and building a new aircraft to meet the latest Part 25 regulations for passenger transport, it's almost insurmountable. There's a reason why there are so few aircraft OEMs.
If we're talking about the future here, it makes much more sense that you'd be buying stocks directly using currency stored on your phones hardware wallet through a DEX like Uniswap. In fact, you might just tell your phone that you want to buy X amount of stock, and it would do it all for you onchain.