An employee for instance, who receives payment in BTC could lose 3-5% of its value within a day due to the fluctuations in the market.
You forgot to add could also gain extra 2 to 5% of his investments too, due to the same volatile nature of the Bitcoin market. Because this volatility has both its advantage and also disadvantages too. However, stable coins like USDT happens to be the most convenient for people who runs businesses and needs a stable means of receiving payment across borders, since the stress of getting a dollar domiciliary accounts.
On the other hand, USDT is designed to maintain a value close to one US dollar, making it a more reliable store of value for short term savings and daily transactions.
However, Bitcoin remains the leading decentralized cryptocurrency in the world and is better suited as a long term investment for many people. In my opinion, the choice depends on the purpose. If someone needs stability for payments or other forms of transaction or short term temporary savings, USDT is the better option in Nigeria's current economy. If the goal is long term investment bitcoin becomes an excellent choice.
It's true that both digital assets are being used for short and long term, but it's just that while the value of Bitcoin fluctuates, that if USDT remains stable, since it is a stable currency. Which is why business men love it the most, as it serves the same purpose of a physical dollar cash.