It's not stupid at all, if you really need to cash it out then why would it be called stupidity?? Different People, Different Views on whether to sell bitcoin or not. if they feel that bitcoin will still fall down for the following days then its a wise decision to sell it out, after all no one could tell when will it rise up again.. on the other hand if one feels that keeping bitcoin woulld be more beneficial then its his or her call.. Its a big No No to call it stupidity..
Yes its not supid if you really need the money, but if you're just panicking because the value is going lesser, thats stupid choice to sell bitcoin now, because i know that you know that bitcoin is volatile, and i guest that is normal. I think big whales have big parts on the bad news spreading on social media about bitcoin. They're using social media to manipulate the value of bitcoin so that they can harvest bitcoin on the panic seller, for them to earn big profit in the future.