The number of foreign nationals with accounts at domestic cryptocurrency exchanges has reached 560,000, but only 90 of them are active users, data showed Sunday. The accounts are believed to have been opened before foreign investment was effectively banned in 2021.

According to data from the Financial Supervisory Service, the five major cryptocurrency exchanges — Upbit, Bithumb, Coinone, DigitalX and GOPAX — had a combined 566,352 accounts held by foreign nationals. The data was obtained and released by Rep. Park Sang-hyuk of the ruling Democratic Party of Korea.

Of these, only 517 foreign-held accounts, or 0.09 percent, had…