If it is not necessary, you do not have to show the public the amount of bitcoin or coins that you bought. One of the first rules about cryptocurrencies is to never show the public your coins.
If you are anonymous on this forum and no Nigerian know who you are, that is fine. But if you are not anonymous, hide your coins. This is a small amount but in case of next time.
How much Bitcoin did this fella bought that will make them become a target? Not enough and also even if this fella is a Nigerian how will other Nigerians on this forum know who he is? The only way this will be possible is if the OP contact other members off this forum himself or herself and that can be a very bad thing to do, because we can't tell the type of people that are on this forum.
I don't have anything to hide on here because this forum has nothing to do with KYC and that's why I am loving it, if verifications are available then it's possible to become a target, also if this forum requires for phone numbers then it's another reason to become a possible target.
Many Bitcoin whales addresses are available everywhere online, and nobody knows who they truly are, OP use a nickname to open his account so I believe there is no way to get your identity revealed, unless you do it yourself.