this reminds me of a metafilter comment from 2012 (because it's literally what is described in the comment):
"There are very interesting things you can do with bitcoin that nobody is doing yet.

Bitcoin is fundamentally a globally synchronized ledger. Think of it this way, every single bank in the world has their entire transaction history available for the public, live. You can use that ledger for more than just exchanging a single currency on that ledger.

Because you can accurately trace the transaction history of coins, as everything is logged, you can overload the coin to have other contractual properties, simply by creating a document that says the 0.00000100 coins derived from this single transaction counts as 100 shares of freely tradeable common stock (you'd need something like a last-in-first-out order specified in the contract).

By tracing who owns individual shares, you can then give voting rights to those addresses (and because they have crypto signature built in, you can vote on board members, etc. Further, since you know the addresses for bitcoin ownership, you can issue dividends. The dividends can be priced in bitcoin, or more interestingly, the dividends can be denominated in US DOLLARS. You can specify 0.00000001 bitcoin as 1 share of an ETN, making 1 share equal to 1 USD backed by a bank.

Because bitcoin supports complex transactions, you can conduct a single transaction of 1 share for 1 USD in a single atomic transaction, with no need for complex clearinghouses as we do today.

Here's where things get crazy: by using distributed hash tables, such as what people use to find peers in bittorrent DHT, you can build a trading floor. The trading floor can have bid-ask spreads (although only the ask side can run without escrow), this means you can build an entire stock exchange with functionally no actual middlemen beyond the distributed bitcoin transaction ledger. All you would need to do is broadcast on the DHT peer-to-peer network an open bitcoin transaction that says "I will accept any transaction that pays me 3 bitcoin for this specially marked 0.00000001 bitcoin that is 1 share of stock in ABC Corp.", which is supported in bitcoin's protocol.

Here's also where things get creepy: if you had a nation-state that recognized this as a valid corporate structure, you could build a company in which ownership is completely unknown. Also, if a hedge fund that invested in these companies, and created a machine learning algorithm that invested successfully and bid on computing power (paid for in bitocoins), and the hedge fund owner was ran over by a truck, you'd have an independent entity surviving on the network with complete agency, with no human control.

There are a lot of creepy things that can happen, a lot of possibly good things (reducing middlemen in banking), either way, we've only begun to scratch the surface of what bitcoin means. If you think it's exclusively the domain for a bunch of wackjob gold bugs hating on the Federal Reserve, I think you're underestimating what bitcoin may be able do in the future."
some other points:
-undetectable stealth takeovers; this is a huge part of the sec's job and it will be fucking chaotic -- stealth sell shares to yourself to artificially depress the prices and boom. but that doesn't really matter because:
-no legal accountability to shareholders woops!
-stealth collusion and market manipulation across different corporations by stealth monopolists
-like someone else said this literally only has utility for criminal enterprises because its baldly illegal in the US and probably every other country