It is problematic when folks set unachievable goals, and it tends to be better to set goals within your reach that might even be more concrete in shorter periods such as what are you going to do for the next 3-9 months in regards to your bitcoin accumulation, and where do you expect to be in 1 year, 3 years, 5 years, 8 years, 10 years etc.. The further out the projections (goals) would be more vague and you might even have base case, worse case and best case scenarios that may also project into the future... and a best case scenario for a guy to reach 5 BTC in 10 years with his current income level would have to include ways of figuring out how to increase income.. and/or other ways of earning bitcoin (which is a similar thing). and sometimes the best case scenarios are so much detached from reality that they are something like fantasy scenarios, which might not be very productive, yet they might not hurt anything as long as they are coupled with more realistic and more likely scenarios..
I have said this a few time already, it is important to set long term as well as short term goals, the short term goal should progress towards the long term ones and it needs to be realistic one too. If I want to have 1 whole bitcoin in the next 5 years then I must start investing based on it, like atleast $2000 -2500 a months will be necessary to achieve that goal if someone starts today and even with $2500 having 1 whole bitcoin at the end of 5 years is an uncertainity due to the only reason that bitcoin is constantly increasing and by that time we intent to achieve the price could have been atleast tripled so the investing amount for DCA also should be adjusted or we will fell short.
With the rapid growth of bitcoin now owning 1 whole bitcoin is almost impossible even with DCA of small amounts like in hundreds so just realize that and act according to that.