It is true that aggressive investing cannot be fruitful in any way. Why should you invest aggressively? You have never been told that you should invest aggressively. Your well-planned advice for Bitcoin investment can be one of the ways to keep your Bitcoin in the long term. You invest Bitcoin regularly with a part of your income. One thing you need to do to keep Bitcoin in regular investment is to have an emergency fund. If you have an emergency fund, then your investment will not be interfered with in any way.
Many people think that they do not need an emergency fund because they think that their income is enough to invest in Bitcoin. In this case, it turns out that they cannot hold Bitcoin in the long term. So take aggressive decisions, but not aggressive investments.
I don’t understand why you would say aggressive buying CANNOT be fruitful in any way, do you really understand what it means to buy aggressively?. Buying aggressively is at the discretion of the investor so long as he/she is not overdoing it and stretching his financial capabilities, it gives you an edge in accumulating more than you would have if you were buying whimsically.
There’s no formula or standard for aggressive buying, if your income or financial source gives you an opportunity to buy aggressively you should take it. If an investor has a discretionary weekly income of $100 and puts 50% into bitcoin and the other into reserve/funds and has done this for a while (maybe 3-6months) he can decide to start buying aggressively by putting 60-80% into bitcoin, surely this is not bad practice OR within the period of his first weeks of investing 50% he gets a gift of $100-200 and decides to put this money into bitcoin (he’s buying aggressively) thereby increasing his portfolio.