Needs are indeed an obstacle for a maxi to have as much bitcoin as possible, it makes someone who believes in bitcoin have to cancel their crazy intentions. But as long as it continues to accumulate, even if it is 5%, 10%, 15% or whatever percentage of income, i think it will not be a problem. One day it will be multiplied from FIAT's side, it's just a matter of time.
Definitely not a problem, but it's not effective.
If you only invest $10 per week and you're believe you will get $10K after 5 years, it looks unrealistic. You're need to get a job that pays more than $40 per month, if you earn $100 per month, you can invest $60, the more you make, the more you invest.
Investing doesn't make you rich if you not earn much.