Cryptocurrencies used to be considered fringe assets, but are now becoming essential portfolio holdings for institutional investors. Galaxy Digital is carving out a lucrative niche in this growing ecosystem.Its trading and investment banking business allow it to profit from transactional activity, regardless of price direction for cryptocurrencies.The asset management business has been rapidly growing as more mainstream investors look for cryptocurrency exposure.Galaxy Digital also has a diverse portfolio of venture capital investments in the blockchain space.It's an under-covered stock that should be on more growth investors' radar.