My father is anxious pertaining to the fall and rise in bitcoin price. He has four(4) btc and he is afraid to hodl. He wants to sell at a lower rate. Any advice for him?
So your father needs to hold his bitcoin and don't need to sell at lower rate. But maybe your father can try to trade with 0.5 btc pair altcoin or usdt so he can have an opportunity to increase his bitcoin. I think that is an option for your father while he is waiting for the bitcoin price to rise again to the high price. I think it's better to do trading rather than just to hold his bitcoin and don't make anything.
Get a therapist.
Why would you be so anxious in something that YOU should know that is already unstable? If you invested anxiously, you're gonna be anxious until you cash it out, either due to panic or due to FOMO.
Where did those 4 BTC came from anyway? Did he play an all-in game into Bitcoin, decided to invest all of his savings into it?
Your father might be getting into Bitcoin too much, in my opinion. This isn't something you should be depress, anxious, or feel too bad that it destroys your mental health from it. What your father should worry about is living a stable life with your family without depending into Bitcoin.