Do Kwon, the co-founder and CEO of Terraform Labs, has been caught along with another man trying to leave Montenegro on a forged passport from Costa Rica and Belgium.
In September, Interpol issued an international red notice for his arrest, but no one could catch him.
Mr Kwon is behind the cryptocurrency Terra Luna and TerraUSD, which collapsed spectacularly last year and cost investors more than $40 billion US dollars.
