You should not be aggressive in collecting Bitcoin, but you can do it according to the DCA method. Whenever you invest according to the DCA method, your investment will be balanced and you will be able to keep it for a long time by following the DCA method regularly. However, if you face a financial crisis even on a monthly basis, you can avoid your bad expenses, because you will eliminate your bad habits and add the money you save from there to your investment.
The more money you can add to Bitcoin investment, the more Bitcoin you will be able to accumulate at the end of the year, we will definitely be able to keep it for a long time by only collecting money and investing Bitcoin regularly.
It must be mandatory for all of us to develop habit of savings. Their are lot of ways in which we can do savings and best of it is to invest in Bitcoin. Everyone has it's own limitations for investing in Bitcoin, the one who can easily afford 100$ a week should invest 100$ per week while the one who can afford to invest 10$ per week must keep investing that much money. It may look boring or useless in start but it's real benefit will be evident if you keep investing for years. Bitcoin price will go up with time and we must be ready to take advantage of that price hike by investing at right moment.
Bitcoin investment shouldn't be done the way you have just explained it, when you invest all you get in a week into Bitcoin investment it can be considered as gambling because you are not investing from your discretionary income, if you invest all you get in a week into Bitcoin what will you then use to sort out your daily needs or other necessary needs when they come up.
Since bitcoin investment is for a longer time we are expected to invest using our discretionary income.