Yes, it's worth thinking about, imho, good on you for considering it.

Yes, the USD has indeed lost 90% of it's value / purchasing-power since it began.

I'm not too familiar with the Naira, but it sounds like it's in a similar inflationary state, and may be replaced with crypto too. :)

LOL, I'm kind of obsessed with speed-learning (& speed-teaching), and I'm glad you appreciate it. You're awesome too! 🙏