tbh if bitcoin replaces the dollar, 1 btc is more then enough to retire 
btw. i think hes 27 - so 13 years are more then enough time to reach that goal
btw. i think hes 27 - so 13 years are more then enough time to reach that goal
Surely, it is possible that BTC could completely replace the dollar in 13 years or less.
However, I think that you are being a little bit optimistic... oh well, this is the speculation thread.
Yeah, he should be able to acquire 1 BTC in the next 13 years.
I would front load it, and just buy the 1 BTC right away; however, if he were to dollar cost average out his investment (which is usually a better long term plan with an asset that is considered to continue to go up in value), then acquiring 1 BTC in 13 years would be acquiring approximately .077 per year or .0065 per month.
But, with a greatly appreciating asset, you would just consider a dollar value amount to invest periodically (like every week or month) and then just continue to invest that amount every time period whether it goes up or down... then over the years, you would be accumulating the asset and hopefully it becomes more valuable and your earlier years of investment would likely be more bang for the buck, but as your income likely goes up you would be able to increase your periodic investment allocation(s).
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