I think another option is to sell altcoin you to usdt or tusd while all market down. and when the bottom in you, buy back some alts and some of BTC or all in alts again, your decision. because if you do not sell altcoin when bitcoin start dropped, alts you can down more, even if you will sell altcoin you before. in it, sell alts is true. and it happened was very quickly. I mean just see so many alts and how much they are worth before a significant decrease in BTC and how much they are worth after recovery. you will see that many coins still worth the lower. then not all coins experience cycle hype this.