Buying fiat currencies with your Bitcoin is a highly speculative investment. They have shown a very high volatility in bitcoin terms. This is due in part to their mysterious creation process. Nobody knows how many more will come into existence. They have no intrinsic value and are involved in the large part of every criminal activity from drug and human trafficking, weapon, wars, you name it. For its distribution, fiat currencies use heavy and highly discretional commercial banking infrastructures that have been found many times responsible of money laundry schemes and that consume a lot of energy consumption which cause pollution. Their paper and coin form is a danger for the public health, carrying around a lot of pathogenic agents.
Please invest in fiat the amount of satoshis you can afford to lose.
For a little perspective in 2011 you could buy 1 USD only if you paid a whole BTC but today that USD is worth 0.000055 BTC.