I think a law stating you can’t borrow against unrealized gains would be sensible.

You can keep your unrealized gains forever, live of your dividends for all i care, and pay no tax. But realizing them, either through selling or borrowing against, triggers a taxation.

This only applies if a username is a email

And if it is then what happens when people actually email someone? Autocorrect during login?

It’s stories like this that don’t surprise me as much as make me ask: How the fuck do you store and process this much data to get anything useful out of it.