If you can invest your savings in Bitcoin, it may not seem like much in the short term, but it can be a great asset in the long run. If an investor can't manage enough money to invest then saving something regularly through DCA can be a source of huge wealth within 4-5 years. But since you are talking about South Korea the cost is much higher as far as I know. However if you can save $100 weekly in BTC then your return on investment will be very high. If you are in a country like South Korea, you can invest a lot more bitcoins if you try a little from the place.
Saving regularly must have regular income as well.
If a student has a good income every week or sets aside the rest of their pocket money to invest in Bitcoin, it is a good way to go.
Slowly and consistently it will provide a considerable amount, especially if it lasts up to 4-5 years.
That would be a great investment, but let's not talk too far for 4 years or 5 years, we only need to look at the next 2 years because the new ATH is likely to be reached.
South Korea might be an example of a fairly developed country with a sizable basic income.
But in some developing countries like mine, it's still quite difficult for high school kids to have enough money to start investing.
Only a few are able to because of financial support from their parents.