well, there are others, I would say, younger and more private and secure currencies than Monero - for example Sumokoin (https://www.sumokoin.org), setting Ring Confidential Transactions (RingCT) with minimum ringsize (mixin) of 12 to conceal sources/amounts transferred and make it high resistance to blockchain analysis (Monero does have 4 or something, even I have read devs are planning to increase it?)or even younger Ombre (https://www.ombre.io)....
add "illegal only" topic - well, that depends on point of view, for me personally there is always benefit to have real privacy for what are you paying for.. which you dont have with "fiat" currencies or less secure/private crypto currencies..
add "illegal only" topic - well, that depends on point of view, for me personally there is always benefit to have real privacy for what are you paying for.. which you dont have with "fiat" currencies or less secure/private crypto currencies..