Bitcoin is very sustainable crypto currency and this is not theoretical or hypothetical as bitcoin has proved its worth by making its existence since more than a decade, has gone through many ups and downs in this decade, has faced many obstacles and now has made tremendous progress but still there are haters of bitcoin as I heard the news that Facebook has banned the crypto ads on its page and then luckily I heard the second news that after banning crypto ads, the valuation of stocks of Facebook has also decreased so this clearly signifies that the era of bitcoin has been started.