There is a big difference. If you buy wheat futures and nobody wants to buy them, you can take delivery of a bunch of wheat. If you buy investment real estate and nobody wants it, you can live in it, or build things on it. If you buy stock in a random Fortune 500 company and nobody wants it, you can take possession of a bunch of desks or factories or inventory or whatever their deal is. And if you take possession of a bunch of US currency you can be assured that you'll be able to use it to settle debts or pay your taxes as long as the US government is around and has better guns than everyone else.
> If you buy stock in a random Fortune 500 company and nobody wants it, you can take possession of a bunch of desks or factories or inventory or whatever their deal is
Not really, the value of the stock approaches zero, and when the company closes up shop I doubt you get anything at all as an investor. Assets would typically be sold to pay off outstanding debts.
More fundamentally, the value of a share of stock is tied to earnings. When companies accumulate capital beyond their horizon of their operational needs, they issue dividends.
Yes, companies can go out of business, but that's not the point Bogle is making. He's not saying stocks are riskless. He's saying that their valuations are tied to notional future earnings and the dividends they will generate.
Bitcoin is different from all those things.