Ignorant of lack of knowledge to the highest level.
A family called the police operatives on their son who seems to be doing financially well while investing on the bitcoin.
The way about the young bitcoin Investor portrays himself happens to be not supposed to be affordable by their son of age 21 considering the poor background they originated from and they don't see the young boy working to earn such living.
In this type of locality, if I know that bitcoin has been seen as a fraud because people and around me, including my family, don't know about it, I will let one of my family members know about bitcoin investment or trading, or any one I do among the two that earns me money, to avoid this kind of thing. If truly, as you said, the parent called police for the young investor, I believe if he put one of his siblings through the system, it won't be like this because they will let the parents know what they are doing that makes them financially okay.
There was a misconception by the parents due to their ignorance about cryptocurrencies and how rumors have been speculating in their localities that bitcoin or cryptocurrencies are all ventures for internet fraudsters which they found unfortunate that their son has engaged himself on it after several times they asked the young boy to go and find a job out there so he could make living out of instead.
Instead of the young man to have a constructive explanation to his uneducated parents probably to say he's working on a remote job, he told the old folks that he's a bitcoin Investor of which they got frightened out of the concept.
I can blame the boy for this, and it's not bad that he told his parents what he does online to make money. It's very good that he let them know that he is a bitcoin investor. The only thing here now is that clear explanation that remains for him to do if he can explain the concept of bitcoin to them. I believe they will believe him. You know, all this is due to ignorance they didn't know anything about, so it remains for him to convince them and continue his bitcoin and other cryptocurrency stuff.