To my surprise, the little I learnt, I decided to start with 2,000NGN as that was all I had.
This not true as 2000 NGN i just $3.4 with the selling rate at Binance #584 and believe many exchangers has set limitation of trading, mostly Binance is $10+ so i don't know how one can trade with 3.4 and become that rich or successful. I can easily be convinced by buying and hold maybe you started with just NGN 2000 as the case maybe, you kept on topping the BTC in your wallet before the price break out. yeah this is a genuine reason.
that would have been a better explanation of the story but the OP clearly said he traided and from what we all now just as you have pointed out the minimum trade amount allowed by most exchange, 2kNGN wouldn't cut it unless he bought from someone on P2P but again he traded and triple his previous losses. We all love a good Bitcoin story and at least it pulled in a Merit 