Selling everything could be good but not as this time if I'm honest due to the fact the halving is coming this year, only if you really need money than you should some bitcoins.
Never sell all your bitcoins that you have because at the end you will regret it for sure because the bitcoin has very good future.
Yeah if you need money as of any emergencies then you should sell a part of bitcoins and rest keep it safe at least for next few months, and you can sell it after the halving.
If you have no other resources in an emergency, then it is OK to sell the bitcoin. Otherwise, just keep the bitcoin.