The whole point of blockchain technology it is its decentralization.
If a company implements its own private blockchain, it won't differ from usual database with many backups on different servers.
I like it that you agree with me and not with the "detailed analysis' you have made.
Those 3.1t in market cap will not exist. Companies that implement the block chain as a solution won't inflate the market cap of coins as there is not going to be a coin in the first place, not even talking about a public traded one.
And if I dig deeper into this, let's assume as per your model shares will be replaced by tokens.
This doesn't mean wow, new tokens, new crypto.
It will still be Walmart and Boeing, not walmartcoin, and the value of those tokens will not have anything to do with the chaotic market we have now.
I didn't agree with you) I said that IT services will partly depent on public blockchains, and cryptocurrencies will be needed to utilize benefits of those public blockchains.
Also, my model has no suggestion about shares will be replaced by tokens. It's only about utility value of public blockchains.