This is no different from any other profit or gain. The Government isn't specifically targeting these people; it just wants them to make sure they realize it's like any other investment.
Here's one situation where it is very different. Say I get paid 100 BTC for doing a job worth $100/BTC at the time or $10000. Now, say BTC drops to $1/BTC. I owe income tax on the $10000. Let's say I owe $2000 (20%) in taxes. However, I only have $100 now. My effective tax rate is 2000%. This does allow for a small deduction of capital gains each year. However you can only deduct $3000 a year in capital gains. In a l…
When my RSU stocks vest, I pay (regular income) taxes on the vested amount. It's treated as if my company gave me the money to buy these stocks I now have. Later when I sell them, I'll pay capital gains tax on the gain/loss.
What you describe is exactly this, with stocks instead of BTC. If my employer gives me any stocks, I have to pay income tax on the value of the stock calculated on the day I received it.
Now I know stocks are volatile. If I decide not to sell them immediately (at essentially 0% capital gains tax), I am deciding to take the risk in price fluctuations.
BTW, if your BTC drops to $100 value in under a year, simply sell them and claim the loss. It will typically be taxed at the same rate as your income, and you'll effectively only pay income tax on $100.