Bitcoin investors should pay close attention to a key metric that suggests when it may be a good time to start selling their BTC. When this metric hits 4%, it may be a signal to begin selling. This analysis comes from experts in the field who closely monitor Bitcoin trends. It is important for investors to be aware of this metric in order to make informed decisions about when to sell their Bitcoin holdings. By staying informed and keeping an eye on this key metric, investors can potentially maximize their profits in the volatile cryptocurrency market.