ASX-listed technology firms DigitalX and Tech Mpire, founded by embattled rich-lister Zhenya Tsvetnenko, have distanced themselves from him following news he faces a 20-year jail sentence in the US, but that hasn't stopped their share prices from taking a beating.

Over the last week blockchain-based software business DigitalX has lost 30 per cent of its value, falling from an already low price of 14¢ to only 9.8¢, whereas Tech Mpire, a digital performance-based advertising company, has lost 16 per cent in the same period, falling to about 31¢.