It’s the difference between owning a farm and a gold bar.
Telsa and Amazon on the other hand believe they have something meaningful to do with the money. But eventually successful companies just don’t have anything useful to do with their giant piles of cash.
If you're referring to investing $1,000, having it be worth $1,500, and then selling off $300 to pay for groceries, which a Coinbase/whatever account would let you do with Bitcoin while it appreciates.
I get something in return for my capital, and the world gets a valuable service.
Bitcoin does not offer that. The only return it offers is the hope that tomorrow some other people will pay me more to take my bitcoin, in the hope that some other people will pay them more the day after to take the bitcoin, with the hope that .... you get it.
In a few decades or even maybe a century, your loan to the dog walker will be denominated in bitcoin.