Math problems for self-help when stuck:

Loss of 10% and 11% return

Loss of 20% and 25% return

Loss of 30% and 42.86% return

Loss of 40% and 66.67% return

Loss of 50% and 100% return

Loss of 60% and 150% return

Loss of 70% and 233.33% return

Loss of 80% and 400% return

Loss of 90% and 900% return, so when you don't chase high, a coin locks you in and loses 90%, it is often a great opportunity to cover your position, I have experienced it many times.