actually its not BTC that being taxed in the USA... Its the dollar You dont pay any taxes on crypto currencies until you sell them for USD. and then its only "IF" you made a capital gain. So you are paying taxes on your USD capital gain on ALL cryptocurrencies just like stocks.
If your trading amount is higher you will be bound to pay your taxes unless you are able to provide all the evidence of your loss and then you can get away with the capital gain tax. If you are a small time trader then you can get away with it but usually everyone who is in the market for a long time made a lot of money and you are bound to file them if you are not looking for trouble at a later time.