You can be an intelligent investor, and get success as well as great profit with Bitcoin investment if you have a proper capital management and investment strategy.
A good investment strategy starts with how you manage your capital for investment and other things beyond investment including emergency fund. Then in investment management, you don't need to purchase bitcoin aggressively, it has nothing to do with your success. A good strategy is invest what you afford to lose, with capital you feel most comfortable for your investment. If aggressively purchases mean something like loans, leverage, it's not good strategy.
Investment success has nothing related to your investment capital like whether it is big or small. If you invest in a right asset with good strategy, you get great investment ROI, and that means your investment success and profit.
I think you are a little bit confuse here let me put you through investing what you can afford to loose is not an investing strategy rather it is an investing advice given to investors both New and old to invest in bitcoin with what they can afford to loose, because there no guarantee that your bitcoin investment will be successful so returns are not guarantee, since nobody knows what will become of bitcoin tomorrow, that is why it's advisable to invest what you can afford to loose in bitcoin.
As for the strategies we have DCA strategy investing a fix amount (discretionary income) either weekly or monthly and this strategy is mostly recommended for newbies who are just getting started with bitcoin, we also have buying the dip that means buying bitcoin when bitcoin price decrease and lastly the lump sum, which means investing a huge amount of money at once in bitcoin.
As for buying bitcoin aggressively, buying bitcoin aggressively doesn't mean that you investing what you can't afford to loose, if you are using $10 to buy bitcoin consistently you are buying bitcoin aggressively okay.
This advice of investing what you can afford to lose makes you sound like a trader or someone who think that investing in Bitcoin is similar to investing in the numerous shitcoins. That does not qualify as investment advice to me because I'm not investing in Bitcoin to lose money as my approach is long term investment with my discretionary income. No one have come forward that they held Bitcoin for a long period of time like 10 years and above, and they lost money, so why will it begin with me? Why should I entertain such fear why I have seen people make great progress in their financial life by holding Bitcoin? If you want to advice someone properly, they right advice is to invest what you can afford to hold for several years without panic. This will give the person the motivation to think and plan long term investment from the beginning and will never panic when their portfolio goes into negative because he is mentally prepared to wait it out and as we know, Bitcoin will always bounce back and put smiles on the faces of those who are patient.