You know what. If you want to invest in a retirement plan, maybe you should simply put your money straight into Bitcoin. Why use Escrows or get the Government to be your middle man?
It may be very enthusiastic for some people. Particularly for Bitcoiners. But realistically, how many people who put money into Bitcoin acknowledge the risks involved? If they decide to invest in a Bitcoin retirement plan, they have to know it may turn out very well or very bad too. I do not know what to think of this. A lot of people may involve themselves way too much without realizing the risks they are taking.
Where I see the advantage in the whole of this idea is the fact that it will be a super long-term investment plan and the fact that Bitcoin have come to stay will give room to these individuals subscribing for the bitcoin retirement plan option to benefit substantially from the system. Let's put into consideration what the potential growth of Bitcoin will be for the next 20 - 30 years then imagine the profitability of this. Again, the investment will be in DCA which means if things go wrong at a point, the individuals involved can decide to switch their plan.
Although the potential of Dollar rising in the future is there and unless there's an emancipation of another global currency that could outshine Dollar in the future, dollar will continue to lead the world's transactions. Who knows if it would be bitcoin that will take over the space or the efforts of the BRICS will ever come into reality. As for the Nigerian Naira, we've only seen it depreciated over the years, so it is already risky leaving your retirement funds in Naira.
When you talk about volatility, I admit that there will be short-term effects and fluctuations like currently experienced, however, bitcoin is already an industry leader in the digital assets and financial technology, what will beat bitcoin is not yet in existence, maybe in the near future but for now, it will continue to lead and appreciate in itself over the long period of time.
Mind you, no one would be forced to invest their pension funds into bitcoin but that could be an option or alternative as stated by OP, so if I was given an option to choose, I will definitely go for bitcoin. I know such monumental progress in a country's financial institution will require new set of policy implementation and public enlightenment to enhance the knowledge of the audience and beneficiaries to that effect.