If you are using $5 to consistently accumulate bitcoin weekly, that is an aggressive buy because it is the amount of money you can comfortably invest in bitcoin at the moment without getting stuck in your accumulation journey.
I am having a hard time agreeing to this writeup of yours because what you described here is consistency and not aggressiveness. Aggressiveness in accumulating bitcoin is measured in the percentage of your total discretionary income you invest into bitcoin.
for example, if the said investor has $8 total discretionary income and invests $5 into bitcoin, that's about 62.5%, I can call that being aggressive, but if the same investor has a total discretionary income of $20 and invests only $5, that's about 25% only. The investor should be seen as being whimpy in his investment and not aggressive since he is investing very little out of his discretionary income into bitcoin.
Heavily depends on what is "aggressive" and what percent is taken as such..