For a market that can be manipulated at times, with no regulation in place, I would be very careful not to focus so much on order books as whales sometimes can use it as a way to deceive people into believing what they want them to believe based on order volume, but in the real sense, that order can be removed at any point in time and before you know it, you can see price dropping lower.
Thats the problem with buying coins from exchanges. You can see buy-sell walls but you wont be able to trust them fully. Majority of the bots on Binance and others have ruined the experience of trading for retail investors and hobbyist traders. Still there is till date no specific countermeasure to prevent this. But by some technical analysis it is becomes known that bitcoin wont drop below 6k unless some huge dump takes place - even if that happens it wont be for long that whales will buy them back.
Sure, it is definite that this is a highly speculative market and nothing can be done to be able to stop it at this point in time, except to just monitor trend and be able to make adjustments as fast as possible.
Just buy low and sell high. Keep track of what you are doing and watch the market. Thats all a normal human can do to gather profits off their portfolio.