If you earn local currency and immediately convert it to whichever stablecoin you choose, you only gain protection from your local currency devaluing against USD, and not from USD inflation itself. Same goes for coins pegged to euro. This could be beneficial if you live in a high inflation country where USD is losing value slower than your local currency, but this won't help if your salary is already in USD or EURO. It's better to invest your extra money into assets that could potentially grow faster than inflation like stocks.
Someone who get paid in USD or EURO won't complain if the inflation rate is high, so they won't mind to hold USD or EURO even though it will lose the value in the long run. Invest in stocks, gold, Bitcoin etc have a chance of loss, if someone convert to those assets for short term period, it's not recommended because instead of growing, you ended up losing.
In this case @OP is from Nigeria and
the inflation rate is 20%-30% per month, that's why convert to stablecoin is the best decision since @OP need for short term period.