Right now it's only use apart from being an investment medium is to convert currency to alt coins, alt coins is where the innovation is and where the real use of distributed ledgers come into play.

Gambling.

gambling is a good, a bad good, mostly, but nevertheless.

International money transfer and store of value that can't be meddled with by another entity.

Various governments have done a pretty good job of meddling with it thus far.

How exactly have they meddled with it?

By threatening to send people who trade Bitcoin to jail: https://www.coindesk.com/bangladesh-outlaw-bitcoin-jail/

That's meddling with the person, not the transaction. The protocol is unassailable. Anyway, if you really want there are mechanisms for anonymous transactions over BTC.

Buying drugs and ransomware.