Of those who invested in cryptocurrencies, more than 80% made money from it, and about 20% made an average return of 425% on their investment, according to the survey. The average Korean investor owned some 5.66 million won ($5,260) in virtual currencies.

Source: A third of South Korean workers have invested in cryptocurrencies like bitcoin — Quartz

Indian government, on the other hand has termed Bitcoin a ponzi scheme.