Crypto Assets a Great Concern, Says Irelandâs Central Bank Enforcer May 31 2021, 1:15 PM May 31 2021, 9:30 AM May 31 2021, 1:15 PM (Bloomberg) -- (Bloomberg) -- The rising popularity of cryptocurrencies such as bitcoin is âof great concern,â according to Derville Rowland, one of the top officials at Irelandâs central bank. âCrypto assets are quite a speculative, unregulated investment,â and people should be âreally aware they could lose the whole of that investment,â the central bankâs director general for financial conduct said in an interview. Rowland, whose department at Irelandâs central bank is known for having imposed heavy fines on some of the nationâs biggest financial firms, joins a host of central bankers who have raised the alarm on crypto investments.