- it is not issued by any central monetary authority.
- it is accepted in VERY few locations (despite what people on this forum would like to believe). You could also point out that most of the merchants that do accept it are (probably) based overseas and not within the jurisdiction of your central bank.
- there is no guarantee that you will be able to exchange it for anything of value in the future.
- there is not a single court decision anywhere in the world finding that it is money.
- it is held mainly by speculators who buy and sell it like a security
I wish you all the best.