Bitcoin is not a legit currency yet because it has not being accepted world wide and it is not regulated by the government. Until most countries have accepted and started using bitcoin and it's regualrised, it won't be a legit currency.
Governments are really afraid of using crypto in their country. I think not all of them will accept the legit Crypto inside of the country because of the corruption of the money. Politics want to have profited from you if you are using Bitcoin.