Bitcoin is now considered by the government as a property, not an income . This is the reason why they want to put taxes. I guess it is fair enough for those who earned hundreds of thousands here in the crypto world. But for those who are just starting to earn, the government should not. Still, I am in favor of the taxation. But the government should also consider the status of the bitcoin's market price.
I do not know whether adding tax to bitcoin could make bitcoin live a longer life. As we all know, bitcoin is something that help stabilise or make use of this taxation to something but for the meantime will be hold. I guess this will be a bad thing specially for those who just started bitcoin.