The Bitcoin policy of the Nigerian government also changes frequently, and Bitcoin is decentralized. Even if a country supports Bitcoin, the government's purpose is only to control Bitcoin to obtain tax returns.
The accuracy of the number of Bitcoin users is a must considering that it can be used as a benchmark in making decisions, if the goal is to get taxes from bitcoin income or other assets.
Actually it is also not a big problem for the country while there are still very many Bitcoin users in the country, but the government must also know how many Bitcoin users are in their area so that they can immediately determine the appropriate decisions or rules for it.