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.