I disagree with you that buying bitcoin aggressively when you can will lead to financial loss if you do it within the size your discretionary income. The level of your aggressiveness is what matters a lot. For example, if I have $100 and choose to invest $80, provided I am not just starting my bitcoin investment and have backup funds on ground. $80 wouldn't make me run  at loss or sell my bitcoin when it's not my will because I still have $20 left from my discretionary income.

It's when you buy over aggressively outside your discretionary income that will make you sell your bitcoin when your needs arises if bitcoin price is below your entry point. The most important thing is that you should have good cash inflow management practice. Investing aggressively gives you the opportunity to build your bitcoin portfolio in a faster pace for the future, which is good. To front load your bitcoin investment is also good.