assuming the history of BTC from 2017 - 2018 will repeat this year, what you'll do with your BTC?
The truth is why should you be in shock because btc is going down heavily; after experiences in 2017-2018; i suppose we all should have learnt that a profit in trade is not a profit until converted to usdt or fiat. So you should take profit from your bitcoin holdings and the whatever happens to the remaining hodling would not bother you at all. trust me.
Always take profit and stop waiting for when the market is bearish to take profit. Take profits in batches.