if I speak three things I think that is too much, I just give advice on things that don't need to be done when bitcoin prices go down, don't panic sell and sell bitcoin at low prices so stay stay on bitcoin and arrive at the highest price.
This is really the thing that must be done. Do not sell during the market on red state, or when it is down, probably hodl and wait for the time when the market turns green or rise again the value. Then it is the perfect time to earn money. Being smart is indeed needed for the bitcoin 's market.