So the question is, for someone in Nigeria who just wants to save money safely, which is the better option: Bitcoin or USDT? Or should people combine both?
It's a simple answer, if you're saving money that you'll be needing soon, then stablecoins pegged to the dollar or any other better performing currency is better since currently Naira is a mess.
If you're ready to invest your money for a longer period of time, then Bitcoin is better since your finances has a great tendency of increasing in value and giving you profits as well when invested into Bitcoin and held for a long term.