The most important thing about bitcoins is that when u buy things with bitcoins you dont have to give tax . It is very important to note that bitcoin is being widely used in the deep web for different purposes.other than that bitcoin is being used for other different purposes also like shopping , buying stuffs from the internet.
I am pretty sure that you are in urgent need to learn enough about the bitcoin and not rely only in news media and TV channels from your country. Everywhere you buy things you pay taxes because the last price which equals the net value plus tax is converted from fiat to bitcoin the transaction time. As an example assuming that someone wants to buy
ledger nano. On the other side if someone uses bitcoin in deep web is more easier for law enforcement authorities to catch him in contrast with fiat money because bitcoin is not anonymous but only pseudonymous.