i'm not sure if it's quite obsolete. if governments have trouble taxing bitcoin, they will definitely not like it. they want their damn share. and the truth is that BTC is a good way of evading taxes.
What was it Netherlands or Finland or some country I don't remember, they had no trouble taxing it. Just because they have people with brains in their government.
Anyone making this as a job should just claim self employed. pay some tax.
better to pay some tax then none at all and have to explain your life style, and possible jail time later down the road.