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Bitcoin DCA is open for everyone, as long as you are willing to invest at least 10$ in bitcoin every week there is good profit waiting for you, if you planning to invest for longer period. Here are result of investing 10$ a week for 10 years and 5 years. 
https://dcacryptocalculator.com/bitcoin
"If you are born poor it’s not your mistake but if you die poor it’s your mistake." Whoever said this is very much true. As we are discussing on this thread, there are ways to improve your financial conditions for investing little amount in bitcoin for longer duration. Those who have enough cash can surely earn big here but there is room for those who have little cash with them.
What you said is true, no one should wait until he or she is in a comfortable zone before they can invest, why many people are poor today is because they don't think about expanding their cost with their little finance, they think big which is not a problem but they despise starting from the foundation, though investment is a mindset, when you don't have it, it will be almost impossible for you to invest if the minimum starting amount for such investment is 1$.
The calculations which I have shown in my previous posts are not about investing a big amount rather they show results of investing 10$ per week over a longer duration. If you are investing a small amount continuously then you are deemed to get success.
It's all about educating yourself that bitcoin is a secure investment. I am saying Bitcoin is secure investment not just because I have Bitcoins but based on historical data. Those who want to improve there financial conditions and are not investing in Bitcoin are doing unjust with them.
For you as person to think about investment, you should possess the spirit of patience in you, for business or investment to flourish obstacles must occur at this time, you keep holding I know that it may seem impossible at the beginning but I know that we can scale through if really want to suffer and earn better in future.
My advice for any potential investor is that whatever you have, go in with it, don't delay further because any delay can be seen as a missed or lost opportunity and this can be regretted forever.
My advice for any potential investor is that whatever you have, go in with it, don't delay further because any delay can be seen as a missed or lost opportunity and this can be regretted forever.
That's very good point. Delaying your investment plan wont give you anything. A thousand mile journey start with a single step, so is bitcoin investment. The first step will be difficult and its about convincing yourself to invest in Bitcoin. We have discussed so many scenarios here that show results of investing in bitcoin. Bitcoin do takes time but it gives guaranteed return more then any Bank can offer.