That is the point of the problem, sometimes we are not unwilling to allocate our income every monht in a large percentage amount, but with the economic situation that still has to divide on other things that ultimately make us as minimal as possible to allocate it. That is not something wrong either, because there should be no compulsion that makes us ignore other needs, because if we do that it is something that is not wise either.
The most important thing when we do this is consistency, for me it doesn't matter when the percentage is more flexible, especially when our financial situation is up and down.
30% is a fairly large allocation because for me it is a very aggressive step in investing.
I disagree with you. 30% is a good amount to start investing in Bitcoin. Its not large at all its accurately a good start in investing and should not be considered as aggressive investing. For instance elf you earn 100$ a month and you use 50% for upkeep and sorting of that month expenses. 20% can be kept for savings or emergency fund and you can invest the 30%. If the economic situation is favorable there persons who would prefer to invest up to 40%. But i would not advice this bold step to family owners because need for other things may arise within the month that could take up some money. Bitcoins price is on the range of $34k it will take a long time to get 1 Bitcoin if you invest less than 30% when your earnings is low. But if you make good money like a $1000 a month even investing 10% a month can give you a good amount of Bitcoin at the end of the year. One thing for sure is that within this period of accumulation the price of Bitcoin might go increase or dip and it will affect the amount of Bitcoin you can buy with that 30%.