Yes the is correct.If you want to be rich by crytocurrency investments,then you should know when to sell your tokens or coins.It is very important to research online  for to gather more informations because it is free.Learning when to sell is a good idea.Dont panic when your crypto went down because that is normal in the crypto market .As long as you believe the project that its promising and legit .Once you reach your goal price sell it and have your profit.