TAM? Maybe define uncommon acronym before using them. I cannot even find its expansion using Google.
> First, the entire financial system can and will be made digital
It already is.
> making every dollar you deal with every day a digital asset that can falls under blockchain
That is a very bold statement.
> Then, you have all online goods: (…)
Those all suffer from the exact same problem than physical assets, they exist and have a purpose outside the blockchain. You already have the oracle problem.
> credibly neutral and publicly interoperable accounting
This is again a very bold statement and facts disagree with you. Blockchains are not interoperable with one another and cannot be, for starters.
> which could one day be 50% of the world economy
This is pure wishful speculation on your part and is based on absolutely nothing.
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EDIT: I found "TAM"'s expansion: total addressable market.