As a 5 years of experience i tried every method for waiting optimal profit. Waiting just with a hold of any coin is not very good at short and mid-term time intervals. Generally holders wait for historical rise but it comes in 3-4 years or maybe more. So even if you wait for that rise you can gain something on short and mid-term time. Basically i assume you have some coin just sell some of them on a small rise period, price is moving with 6k-8k for a few month so when you see 7-8k prices start to sell dont sell all but some of them should be great. Even if it rises after you sell you are now waiting it to fall , and short time period it always falls just wait 1-2 months low and buy even if it drops more you basically gained profit. So if you can read some trend moves you can invest mid-term so you dont have to hold for years. If price starts to rise historically then it is time to buy.
But understanding the trend of the movement on the prices of crypto currencies is very hard you need to be lucky to make money with this buying at the low and sell them at the high but it is also a great strategy to make huge money than waiting for the prices to increase in very huge percentage.But another strategyy maybe convert them into stable coins whe the prices falls and the move again into the crypto once it reaches bottom.
You do not need to be lucky to make money in this market; all you just need is great level of knowledge and practice to be able to have solid strategy in place when trading the market without any form of emotions at all.
The emotions are bound to happen at first, but over time, as you keep practicing, you will keep gaining more confidence on relying on your strategy and always stick to one strategy and be better at it as long as it is working for you. As long as you are ready to learn, you will eventually be able to know what to do at most times.