Its very bad decision to sell ALL Bitcoin because you cannot know what happens. The only truth is no1 knows if we are at start of huge bullrun or if bear market comes soon. Nobody knows the risks of Tether and other "stablecoins". Nobody knows the risk of real world crash for USD and EURO.

Michael Saylor said if you need money just lend your Bitcoin to a Bank. That way you also dont pay tax. That is probably the best strategy but same applies. Never lend out ALL your Bitcoin!