From what I've come to see, such investment has lots of disadvantages and limitations due to unforseen circumstances like war and government policies that could make the cite of the buildings inhabitable thereby making the investment unprofitable and sometimes most men at the point of retirements, discovering that they can't get access to all they've invested into become traumatized in the process.
Investing into Bitcoin is good and for the time being, we can actually make a ten year speculation on the fact that it will still remain a valuable and profitable investment but the question here is;
Is it wise and realistic for someone in his early twenties to set up Bitcoin as a retirement plan such that he continues accumulating Bitcoin from this time till he gets to his retirement age?
Investment in Bitcoin is a perfect option for the future, but you should not put all your savings into Bitcoin. If you plan to invest a chunk of your money into Bitcoin on DCA, you are doing the right thing. By the time you touch 50, you will have more money than your fellow countrymen. Diversify your investment to offline assets such as gold, silver, property, etc., because this will give you a cushion against BTC price volatility. People in your community are doing the right thing. You should also invest some of your savings into property, and buy a house or an apartment. It is not wise to put all your money into crypto investment because of the rate of fluctuation we see in Bitcoin.