It's not. It's a lousy currency compared to the current fiat payment rails available is most countries. At most, it can still be a replacement for cash when it is eventually banned.

As a store of wealth, however, nothing comes close to it.

And no, you don't need to spend it, ever, just like you don't usually need to sell your house to buy groceries unless you fucked up really badly. If you're doing things right, you will be able to borrow against it and invest in other assets that bring cash flow to pay back the loan and keep your bitcoin intact,