The time to sell was long ago. Selling now is risky since you do not know the bottom. Selling alts, I wouldn't dare to say. Normally if BTC drops they drop further, but this ratio has been lessening compared to the past. Truthfully, if you were going to hodl the best would have been to be totally in BTC for a while now.

That being said, I am still more than 50% in alts too. I am riding it out, but I am expecting significant losses still