First Scenario: ₦10 million in Bitcoin in 2018 to 2025.
In 2018, 1 BTC = $6,500.
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So investing ₦10m in Bitcoin 7 yeears ago will give you ₦734m as of today
You're exaggerating the figures, Bitcoin was never $6,500 in 2018, it started around $13k and ended the year with
around $17k so overall your calculations are wrong. 10m in 2018 could have gotten you only 1BTC or 1.5 BTC in 2018
Second Scenario: ₦10 million in Land Lagos.
In 2018, ₦10m could buy a plot in Lekki Phase 2 or half a plot in Ajah, Banana Island was already ₦300m–₦500m then, so ₦10m wouldn’t qualify.
A plot of land in Lekki was already around 50m so this is another misinformation and calculations and don't forget that Bitcoin did over -80% did over this period, so imagined you needed urgent money during any of those dips meanwhile land only increases, it doesn't decrease in value and also Naira depreciation played a big role in your calculations too.
Naira was around 380/1$ in 2018, today it's over N1500. They're incomparable, you just have to choose which is more convenient for you.