Because, the earlier you know the best way to defend yourself if eventually you happens to come across such scenario whereby you encounter Police or EFCC, and eventually got held of your mobile phone and saw apps like Binance, Trust Wallets and Bybit and tagged you as a Yahoo Boy, when eventually you are a legit hustler, the better for you. Hence, if anybody ask you from today henceforth what you do for a living, is best you answer that you are a "Bitcoin Discusser" whereby you earn money by discussing about Bitcoin on its official forum.
Apart from the fact that there are some street scammers scamming people via BTC and crypto transaction whom the police or EFCC would like to pounce on them, Bitcoin is not completely banned in the country, so, if the police will do their job properly, they can not convict someone who is earning in a legit way via Bitcoin, otherwise let them take you to court and prove you are a fraudster.
If the police already sees it as a crime to even find crypto exchanges and wallets on your phone, they problem will not believe what ever you have to tell them but they will like to extort from you, so the best thing to do is to avoid them, avoid such scenario if you can, but if it still happens and you are clean, then let them take you to court instead of you giving them some money that they don't deserve.
You can have two devices, a phone and a laptop or two phones, which you can keep one of the phone at home and that should be where you keep everything that relate to crypto, it could also be on your laptop which you don't usually carry alone in every movement you make.