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.
Yes, we know this year's bitcoin prices tend to move only in the range of $6 - $8k, if you hold fiat on the exchange you use then you can buy it in the range of $6k and just wait a few days or even hours you can sell it in the range of $7k . Falling prices now can be said not too far and tend to be stable, if you can see the graph properly, then you can still get profit from your daily trading.