Being overly aggressive only means one thing which is; you will have to likely invest more than you can afford to loss. So it's very much important that we identify the level in which our investment is within a level that we can take whatever happens thereafter. This implies that we should invest solely from our discretionary income or moreover if you want to be aggressive you can then use up to 90% of your discretionary income that we can call aggressive investments but if you do an aggressive investment outside your discretionary income it will likely end up that you will have to struggle psychologically or financial probably leading to tempering with your investment.
Buying aggressively all the time is not a good idea. Because if a person buys aggressively every time, if he needs some amount of money, then maybe that person can get very broke. For example, if a person invests with 80% or 90% of his discretionary income all the time, then when there is a small financial crisis, he will have to depend on his emergency fund or take a loan from someone. But yes, how much % to invest is completely their personal choice. But I think it is right to invest 35% to 45% of your discretionary income. Because it will not be too aggressive and not too low.
You can continue to buy continuously by adopting the DCA method and if you see a decline in the market, you can buy aggressively if you want.
Buying aggressively depends on a couple of factors, it can be convenient for some investors while it won't be for others. In my estimation buying aggressively should depend on your income and expenses, if you don't have much responsibilities then you can afford to buy aggressively. If you have enormous responsibilities and your basic income is almost all of your income it'll be impossible to buy aggressively because your discretionary funds will be very small.
I don't have a problem with buying aggressively if it doesn't affect your basic expenses and you're able to make provision for emergency funds no matter how small. The money you invest in Bitcoin is still your money but buying aggressively is not advisable for the long term. It can affect the quality of your life because you'll be concentrating money more on accumulation while ignoring other aspects of your life that makes it meaningful.