It might help if you could tell us where you're from? Are you completely sure that it's illegal to invest in cryptocurrency for individuals, usually regulations like that are targeted against financial institutions.
If it is indeed illegal, I wouldn't really recommend breaking the law, but if you do, at least check beforehand what the consequences would be if you get caught.
Yes please share your locality. then only people can advise you. because if your governament announced officially the Crytpo trading is illegal then don't buy any coin with using your bank account you will get trapped.
Find any local sellers and buy your coins for liquid cash don't do any bank transactions.
Thanks a lot for giving me a fantastic idea.