And in addition what @Tungbulu has said.
First of all, let me quickly correct an impression, the purpose of being aggressive isn't necessarily to maximize on short term gains or "to see good gains" as you put it, the main purpose of investors being aggressive should be reach their long term goals faster and not to capitalize on short term gains.
Now Usually every investor is meant to invest with their discretionary income, in a situation where an investor due to much eagerness to reach their goals faster, decides to invest with all their Emergency funds, rather than just a fraction or percentage of it, they're being aggressive enough, and this level of aggressiveness could still be arguably considered to be reasonable, but when folks starts feeling like their discretionary income isn't enough to help them reach their goals faster, and then they opt for other means, like taking loans and/or even using funds meant for some other purposes, then that's IMO definitely being reckless and an unhealthy approach to building one's Bitcoin investment.