Yes you are right, Timing the market is actually a terrible way to invest in Bitcoin because by doing so you are going to miss so many buying opportunities that would have been used to buy a huge chunk of Bitcoin, so it's not wise to wait before buying, because you might not even buy in the process of waiting since you might still be waiting thinking that the price of Bitcoin might go deeper.
Actual investors know that with investment, there are two main things to know, and obey.
Invest in long term which means accumulation for long term investment is a long process so it leads to a second point.
Don't time the market as with long term investment, it is no longer necessary.
Additionally, having the basic knowledge is one thing and acting in it is another thing, so starting once you have the basic needs is the ideal thing to do once your discretionary income is available, because now is the best time to invest in Bitcoin not tomorrow or next tomorrow.
Basic knowledge will help investors knowing that a good strategy is Dollar Cost Averaging for their investment accumulation over a long time. They know that with long term investment, this DCA strategy will help them accumulating bitcoin very effortlessly - without need of timing the market, finding any market bottom, time of bear market ending, time of bull market start and ending.
They can also apply DCA for their withdrawals/ profit taking too.
https://costavg.com/https://bitcoindata.science/withdrawal-strategy