1. Be patient, don't panic.
2. Buy and hold.
The first attitude is very suitable to be applied and very many traders experience tremendous panic when they see the market price drop, especially Bitcoin is now at $18k.
It's becoming increasingly apparent that other coins are very influential on Bitcoin. So, the opportunity to buy to increase the volume of Bitcoin can be done again for long-term investments. The current market situation in my opinion is a very tough test to be applied by those who are impatient.
Do not panic. Everything will get better.
It’s really bad to see your asset steadily losing value, but as you correctly noted, this will pass and everything will get better. To do this, if you certainly believe in BTC and the fact that its price will grow and show a new ATH, you need to hold BTC, if possible, buy more and wait for the price to rise. Of course, this is very difficult to do, and therefore many traders and holders, especially those without experience, are very nervous and worried. So in this situation, either you are waiting for the price of BTC to rise or you are selling it.