Isn't that obvious that he's just making an assumption? Moreover I think the wise and the rich are the ones that engage themselves in buying bitcoin aggressively the most, reason is because they have a steady source of income that they can use to load thier discretionary income so as to enable them invest with any amount they wish to go with
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.
Who is the person that passed the law that investors don't need to aggressively buy Bitcoin when they are managing their investment? Buying bitcoin aggressively won't stop you from managing your bitcoin investment in the right way; it is only when you overdo it that you will pass through difficult times to manage and sustain your bitcoin investment for the long term, and if you're not strong enough, you will sell your bitcoin to survive. Buying aggressively doesn't necessarily mean using the amount of money you haven't used before to buy bitcoin. 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.