You can buy BTC all the time when you are financially buoyant, don't forget that all investors are not equal in this industry, and it will be favourable to buy BTC in the bear run because there is a chance for investors to boost their profits in the bull season.
Financial buoyancy doesn't mean one is ready yet for investment. However, it is more a criterion to being any investment which is having the capital yet and stability to invest in the long term. Just because someone has the money doesn’t mean they should invest without a plan. A person should assess their goals, financial obligations, and overall strategy before investing in Bitcoin. Most persons who started investing a long time ago and held till this current ATH. It was not all about the finance alone but the goals they set for long term.
If you are financially buoyant you can start your investment you don't have to do all those assessment you just mentioned before starting your accumulation you can start your accumulation and as time goes on you start planning your self properly the reason why I'm saying so is because you won't know a lot of things about Bitcoin investment until you go into it like me for example it was when I started accumulation that I started knowing the important things I should access and evaluate.
So if you are financially cable to start accumulating Bitcoin all you need to do is learn how to buy and hodl the rest things you need you will learn and start doing it as time goes on, you don't have to know everything before starting when you have started your accumulation journey you will know the strategy that will suit you well you won't know if you have not started accumulation.
There's a saying that " you will never know the true test of a food until you eat it." That is how Bitcoin investment is.