If you are investing in the short term, then you have to analyze the market. In the case of long term investment, you have to continue buying continuously by relying on your discretionary income. You should continue buying continuously until the goal of building your portfolio is met.
Analysing the Markets is for traders alone but since you're a long term investor, there's no need trying to analyze the market inother not to get you distracted/discouraged and it could even slow down your accumulation pace which is very important.
By applying the Use of DCA strategy on your Bitcoin investment,You don't need to worry yourself about the price of the Bitcoin any more. With DCA strategy, you can simply keep buying and accumulate Bitcoin regardless of the price Using your available discretional income.
One of your main focus as a long term investor is to reach your desirable accumulation target and it is only achievable when you're consistent and steadily accumulating Bitcoin into your portfolio. You can also buy Bitcoin immediately your discretional income is available. Moreover as an investor, you can also go aggressive by increasing the size of your discretional income if your jobs earnings have increased as well.
However as a long term investor,it is also important to your build Emergency funds and your backup funds simultaneously with your portfolio using your discretional income while also holding for at least a longer period of 4-10 years.