If prices are falling, then for me, I need to hold my bitcoin until such time that the price will rise again so I can gain in the future.
Holding is really a very good idea at the time when prices are decreasing. I think you can also go for more investment and can buy more Bitcoins at that time. This will help you earn a lot of profit and you will get a lot of earning in this way. All you need is to have patience and thats all.