Can anybody tell me why so many people think that Web 3 = NFTs + crypto currencies? NFTs and crypto currencies are a part of what people think the Web 3.0 will be, but they are definitely not synonyms. The author, however, seem to have did that.

If you have to ask, then it is a scam.

When did web3 became cryto? I have seen a recent push on us about web3 being crypto. Is this some kind of propaganda?

Where may I see the source code for the "Web3" TODO app?

How complex is that source code?

Are centralized APIs used in order to access the "decentralized" Ethereum blockchain?

Web3 will be a web where everyone has anonymous identity, meaning they are identified by their crypto-wallets. There is no need to authenticate yourself except once, to your crypto-wallet. You don't have to create accounts anywhere, your crypto-account is all you need.

Of course you can have multiple separate identities, meaning multiple separate crypto-wallets, if you wish.

Could someone try to explain to me what "keep our digital identities sealed" even means?

Yes! and so is anything based on blockchain

Why web3 not Web 3.0?